diff --git a/CHANGELOG.md b/CHANGELOG.md
index 332576b3..49759dea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -86,6 +86,7 @@ Developers may need to change their code
 
 ### Minor changes
 
+* Augment target node check strict, instead of printing a warning, it will terminate with error.
 * Implemented: [Simplifying error messages for regex validations. #174](https://github.com/clicon/clixon/issues/174)
 * Add ca_reset plugin also when backend starts as `-s none`
 * Corrected client session handling to make internal IPC socket persistent
@@ -113,6 +114,9 @@ Developers may need to change their code
 
 ### Corrected Bugs
 
+* Fixed: [Augment that reference a submodule as target node fails #178](https://github.com/clicon/clixon/issues/178)
+* Fixed a memory error that was reported in slack by Pawel Maslanka
+  * The crash printout was: `realloc(): invalid next size Aborted`
 * Fixed: [Irregular ordering of cli command + help text when integer is a part of command #176](https://github.com/clicon/clixon/issues/176)
   * Enabled by default `cligen_lexicalorder_set()` using strversmp instead of strcmp
 * Fixed: [xml bind yang error in xml_bind_yang_rpc_reply #175](https://github.com/clicon/clixon/issues/175)
diff --git a/apps/backend/backend_main.c b/apps/backend/backend_main.c
index 1e95d963..c030e196 100644
--- a/apps/backend/backend_main.c
+++ b/apps/backend/backend_main.c
@@ -1011,7 +1011,8 @@ main(int    argc,
 
     /* Start session-id for clients */
     clicon_session_id_set(h, 0);
-    if (clicon_debug_get() && 
+    /* Enable this to get prints of datastore and session status */
+    if (0 && clicon_debug_get() && 
 	backend_timer_setup(0, h) < 0)
 	goto done;
     if (stream_timer_setup(0, h) < 0)
diff --git a/apps/restconf/restconf_main_evhtp.c b/apps/restconf/restconf_main_evhtp.c
index f921f374..541ba13c 100644
--- a/apps/restconf/restconf_main_evhtp.c
+++ b/apps/restconf/restconf_main_evhtp.c
@@ -695,7 +695,7 @@ usage(clicon_handle h,
     fprintf(stderr, "usage:%s [options]\n"
 	    "where options are\n"
             "\t-h \t\t  Help\n"
-	    "\t-D <level>\t  Debug level\n"
+	    "\t-D <level>\t  Debug level _ overrides any config debug setting\n"
     	    "\t-f <file>\t  Configuration file (mandatory)\n"
 	    "\t-E <dir> \t  Extra configuration file directory\n"
 	    "\t-l <s|f<file>> \t  Log on (s)yslog, (f)ile (syslog is default)\n"
@@ -923,6 +923,7 @@ cx_evhtp_socket(clicon_handle    h,
  * @param[in]  xconfig  XML config
  * @param[in]  nsc      Namespace context
  * @param[in]  eh       Evhtp handle
+ * @param[in]  dbg0     Manually set debug flag, if set overrides configuration setting
  * @retval     -1       Error
  * @retval     0        OK, but restconf disabled, proceed with other if possible
  * @retval     1        OK
@@ -931,7 +932,8 @@ static int
 cx_evhtp_init(clicon_handle     h,
 	      cxobj            *xrestconf,
 	      cvec             *nsc,
-	      cx_evhtp_handle  *eh)
+	      cx_evhtp_handle  *eh,
+	      int               dbg0)
 {
     int     retval = -1;
     int     ssl_enable = 0;
@@ -962,7 +964,9 @@ cx_evhtp_init(clicon_handle     h,
 	server_key_path = xml_body(x);
     if ((x = xpath_first(xrestconf, nsc, "server-ca-cert-path")) != NULL)
 	server_ca_cert_path = xml_body(x);
-    if ((x = xpath_first(xrestconf, nsc, "debug")) != NULL &&
+    /* Only set debug from config if not set manually */
+    if (dbg0 == 0 &&
+	(x = xpath_first(xrestconf, nsc, "debug")) != NULL &&
 	(bstr = xml_body(x)) != NULL){
 	dbg = atoi(bstr);
 	clicon_debug_init(dbg, NULL); 	
@@ -1022,12 +1026,14 @@ cx_evhtp_init(clicon_handle     h,
  * That is, EITHER local config OR read config from backend once
  * @param[in]  h     Clicon handle
  * @param[in]  eh    Clixon's evhtp handle
+ * @param[in]  dbg0     Manually set debug flag, if set overrides configuration setting
  * @retval     0     OK
  * @retval    -1     Error
  */ 
 int
 restconf_config(clicon_handle    h,
-		cx_evhtp_handle *eh)
+		cx_evhtp_handle *eh,
+		int              dbg)
 {
     int            retval = -1;
     char          *dir;
@@ -1139,7 +1145,7 @@ restconf_config(clicon_handle    h,
     /* First try to get restconf config from local config-file */
     if ((xrestconf1 = clicon_conf_restconf(h)) != NULL){
 	/* Initialize evhtp with local config: ret 0 means disabled -> need to query remote */
-	if ((ret = cx_evhtp_init(h, xrestconf1, NULL, eh)) < 0)
+	if ((ret = cx_evhtp_init(h, xrestconf1, NULL, eh, dbg)) < 0)
 	    goto done;
 	if (ret == 1)
 	    configure_done = 1;
@@ -1175,7 +1181,7 @@ restconf_config(clicon_handle    h,
 	/* Extract restconf configuration */
 	if ((xrestconf2 = xpath_first(xconfig2, nsc, "restconf")) != NULL){
 	    /* Initialize evhtp with config from backend */
-	    if ((ret = cx_evhtp_init(h, xrestconf2, nsc, eh)) < 0)
+	    if ((ret = cx_evhtp_init(h, xrestconf2, nsc, eh, dbg)) < 0)
 		goto done;
 	    if (ret == 1)
 		configure_done = 1;
@@ -1221,7 +1227,7 @@ main(int    argc,
 	case 'h':
 	    usage(h, argv0);
 	    break;
-	case 'D' : /* debug */
+	case 'D' : /* debug. Note this overrides any setting in the config */
 	    if (sscanf(optarg, "%d", &dbg) != 1)
 		usage(h, argv0);
 	    break;
@@ -1339,7 +1345,7 @@ main(int    argc,
     _EVHTP_HANDLE = eh; /* global */
 
     /* Read config */ 
-    if (restconf_config(h, eh) < 0)
+    if (restconf_config(h, eh, dbg) < 0)
 	goto done;
     /* Drop privileges after evhtp and server key/cert read */
     if (drop_privileges){
diff --git a/lib/clixon/clixon_yang.h b/lib/clixon/clixon_yang.h
index d9e76ca8..fa4bef0b 100644
--- a/lib/clixon/clixon_yang.h
+++ b/lib/clixon/clixon_yang.h
@@ -181,7 +181,7 @@ typedef int (yang_applyfn_t)(yang_stmt *ys, void *arg);
  *       leaf, leaf-list, list, choice, case, rpc, input, output,
  *       notification, anydata, and anyxml.
  */
-#define yang_schemanode(y) (yang_datanode(y) || yang_keyword_get(y) == Y_RPC || yang_keyword_get(y) == Y_CHOICE || yang_keyword_get(y) == Y_CASE || yang_keyword_get(y) == Y_INPUT || yang_keyword_get(y) == Y_OUTPUT || yang_keyword_get(y) == Y_NOTIFICATION)
+#define yang_schemanode(y) (yang_datanode(y) || yang_keyword_get(y) == Y_RPC || yang_keyword_get(y) == Y_CHOICE || yang_keyword_get(y) == Y_CASE || yang_keyword_get(y) == Y_INPUT || yang_keyword_get(y) == Y_OUTPUT || yang_keyword_get(y) == Y_NOTIFICATION || yang_keyword_get(y) == Y_ACTION)
 
 /*
  * Prototypes
diff --git a/lib/src/clixon_yang.c b/lib/src/clixon_yang.c
index 1ce5f149..dac35031 100644
--- a/lib/src/clixon_yang.c
+++ b/lib/src/clixon_yang.c
@@ -97,6 +97,7 @@ static int yang_search_index_extension(clicon_handle h, yang_stmt *yext, yang_st
  * Here is also the place where doc on some types store variables (cv)
  */
 static const map_str2int ykmap[] = {
+    {"action",           Y_ACTION}, 
     {"anydata",          Y_ANYDATA}, 
     {"anyxml",           Y_ANYXML}, 
     {"argument",         Y_ARGUMENT}, 
@@ -497,12 +498,15 @@ ys_prune(yang_stmt *yp,
     
     if (i >= yp->ys_len)
 	goto done;
-    size = (yp->ys_len - i - 1)*sizeof(struct yang_stmt *);
     yc = yp->ys_stmt[i];
-    memmove(&yp->ys_stmt[i],
-	    &yp->ys_stmt[i+1],
-	    size);
-    yp->ys_stmt[yp->ys_len--] = NULL;
+    if (i < yp->ys_len - 1){
+	size = (yp->ys_len - i - 1)*sizeof(struct yang_stmt *);
+	memmove(&yp->ys_stmt[i],
+		&yp->ys_stmt[i+1],
+		size);
+    }
+    yp->ys_len--;
+    yp->ys_stmt[yp->ys_len] = NULL;
  done:
     return yc;
 }
@@ -931,10 +935,16 @@ yang_find_schemanode(yang_stmt *yn,
 
     for (i=0; i<yn->ys_len; i++){
 	ys = yn->ys_stmt[i];
-	if (ys->ys_keyword == Y_CHOICE){ /* Look for its children */
+	if (yang_keyword_get(ys) == Y_CHOICE){ 
+	    /* First check choice itself */
+	    if (ys->ys_argument && strcmp(argument, ys->ys_argument) == 0){
+		ysmatch = ys;
+		goto match;
+	    }
+	    /* Then look for its children (case) */
 	    for (j=0; j<ys->ys_len; j++){
 		yc = ys->ys_stmt[j];
-		if (yc->ys_keyword == Y_CASE) /* Look for its children */
+		if (yang_keyword_get(yc) == Y_CASE) /* Look for its children */
 		    ysmatch = yang_find_schemanode(yc, argument);
 		else
 		    if (yang_schemanode(yc)){
@@ -950,7 +960,9 @@ yang_find_schemanode(yang_stmt *yn,
 	} /* Y_CHOICE */
 	else
 	    if (yang_schemanode(ys)){
-		if (argument == NULL)
+		if (yang_keyword_get(ys) == Y_INPUT || yang_keyword_get(ys) == Y_OUTPUT)
+		    ysmatch = ys;
+		else if (argument == NULL)
 		    ysmatch = ys;
 		else
 		    if (ys->ys_argument && strcmp(argument, ys->ys_argument) == 0)
@@ -1070,7 +1082,7 @@ yang_find_prefix_by_namespace(yang_stmt *ys,
     yang_stmt *yimport;
     yang_stmt *yprefix; 
 
-    clicon_debug(1, "%s", __FUNCTION__);
+    clicon_debug(2, "%s", __FUNCTION__);
     /* First check if namespace is my own module */
     myns = yang_find_mynamespace(ys);
     if (strcmp(myns, ns) == 0){
@@ -2559,7 +2571,6 @@ schema_nodeid_iterate(yang_stmt    *yn,
     char            *prefix; /* node-identifier     = [prefix ":"] identifier */
     char            *id;    
     yang_stmt       *ys;
-    yang_stmt       *ym2;
     yang_stmt       *yp;
     cg_var          *cv;
     char            *ns;
@@ -2586,34 +2597,28 @@ schema_nodeid_iterate(yang_stmt    *yn,
 	    clicon_err(OE_YANG, EFAULT, "No module for namespace: %s", ns);
 	    goto done;
 	}
-       /* Iterate over children of current node to get a match 
-	* XXX namespace?????
-	*/
-	ys = NULL;
-	while ((ys = yn_each(yp, ys)) != NULL) {
-	    if (!yang_schemanode(ys))
-		continue;
-
-	    /* some keys dont have arguments, match on key */
-	    if (ys->ys_keyword == Y_INPUT || ys->ys_keyword == Y_OUTPUT){
-		if (strcmp(id, yang_key2str(ys->ys_keyword)) == 0){
-		    break;
-		}
-	    }
-	    else {
-		if (ys->ys_argument && strcmp(id, ys->ys_argument) == 0){
-		    /* Also check for right prefix/module */
-		    ym2 = ys->ys_mymodule?ys->ys_mymodule:ys_module(ys);
-		    if (ym2 == ymod)
-			break;
-		}
-	    }
-	} /* while ys */
+	ys = yang_find_schemanode(yp, id);
+	/* Special case: if rpc/action, an empty input/output may need to be created, it is optional but may 
+	 * still be referenced.
+	 * XXX: maybe input/output should always be created when rpc/action is created?
+	 */
+	if (ys == NULL &&
+	    (yang_keyword_get(yp) == Y_RPC || yang_keyword_get(yp) == Y_ACTION) &&
+	    (strcmp(id, "input") == 0 || strcmp(id, "output") == 0)){
+	    enum rfc_6020 kw;
+	    kw = clicon_str2int(ykmap, id);
+	    /* Add ys as id to yp */
+	    if ((ys = ys_new(kw)) == NULL)
+		goto done;
+	    if (yn_insert(yp, ys) < 0) /* Insert into hierarchy */
+		goto done;
+	}
 	if (ys == NULL){
 	    clicon_debug(1, "%s: %s not found", __FUNCTION__, id);
 	    goto ok;
 	}
-	yp = ys;
+	yp = ys; /* ys is matched */
+
     } /* while cv */
     assert(yp && yang_schemanode((yang_stmt*)yp));
     *yres = (yang_stmt*)yp;
diff --git a/lib/src/clixon_yang_parse.y b/lib/src/clixon_yang_parse.y
index f1d09def..f0dd49a3 100644
--- a/lib/src/clixon_yang_parse.y
+++ b/lib/src/clixon_yang_parse.y
@@ -1791,7 +1791,7 @@ desc_schema_nodeid_str : desc_schema_nodeid
 desc_schema_nodeid : node_identifier
                      { $$= $1; clicon_debug(3,"descendant-schema-nodeid -> node_identifier"); }
                    | node_identifier abs_schema_nodeid
-		   { if (($$=string_del_join($1, " ", $2)) == NULL) _YYERROR("desc_schema_nodeid");clicon_debug(3,"descendant-schema-nodeid -> node_identifier abs_schema_nodeid"); }
+		   { if (($$=string_del_join($1, "", $2)) == NULL) _YYERROR("desc_schema_nodeid");clicon_debug(3,"descendant-schema-nodeid -> node_identifier abs_schema_nodeid"); }
                    ;
 
 identifier_str : '"' IDENTIFIER '"' { $$ = $2;
diff --git a/lib/src/clixon_yang_parse_lib.c b/lib/src/clixon_yang_parse_lib.c
index 3629c81e..a37e4dbd 100644
--- a/lib/src/clixon_yang_parse_lib.c
+++ b/lib/src/clixon_yang_parse_lib.c
@@ -238,12 +238,18 @@ yang_augment_node(yang_stmt *ys)
 	goto done;
 
     if (ytarget == NULL){
-#if 0 /* Lots of yang models fail here */
+#if 1
+	/* Fail with fatal error if augment target not found 
+	 * This is "correct"
+	 */
 	clicon_err(OE_YANG, 0, "Augment failed in module %s: target node %s not found",
 		   yang_argument_get(ys_module(ys)),
 		   schema_nodeid);
 	goto done; 
 #else
+	/* Log a warning and proceed if augment target not found 
+	 * This may be necessary with some broken models
+	 */
 	clicon_log(LOG_WARNING, "Warning: Augment failed in module %s: target node %s not found",
 		   yang_argument_get(ys_module(ys)),
 		   schema_nodeid);
@@ -276,7 +282,7 @@ yang_augment_node(yang_stmt *ys)
 	    if (childkey != Y_ACTION && childkey != Y_NOTIFICATION && childkey != Y_UNKNOWN &&
 		childkey != Y_CONTAINER && childkey != Y_LEAF && childkey != Y_LIST &&
 		childkey != Y_LEAF_LIST && childkey != Y_USES && childkey != Y_CHOICE){
-		clicon_log(LOG_WARNING, "Warning: A Augment failed in module %s: node %s %d cannot be added to target node %s",
+		clicon_log(LOG_WARNING, "Warning: Augment failed in module %s: node %s %d cannot be added to target node %s",
 			   yang_argument_get(ys_module(ys)),
 			   yang_key2str(childkey),
 			   childkey,
@@ -295,7 +301,7 @@ yang_augment_node(yang_stmt *ys)
 	    if (childkey != Y_CONTAINER && childkey != Y_LEAF && childkey != Y_LIST && 
 		childkey != Y_LEAF_LIST && childkey != Y_USES && childkey != Y_CHOICE &&
 		childkey != Y_UNKNOWN){
-		clicon_log(LOG_WARNING, "Warning: B Augment failed in module %s: node %s %d cannot be added to target node %s",
+		clicon_log(LOG_WARNING, "Warning: Augment failed in module %s: node %s %d cannot be added to target node %s",
 			   yang_argument_get(ys_module(ys)),
 			   yang_key2str(childkey),
 			   childkey,
@@ -316,7 +322,7 @@ yang_augment_node(yang_stmt *ys)
 		childkey != Y_CHOICE && childkey != Y_CONTAINER && childkey != Y_LEAF &&
 		childkey != Y_LIST && childkey != Y_LEAF_LIST){
 
-		clicon_log(LOG_WARNING, "Warning: C Augment failed in module %s: node %s %d cannot be added to target node %s",
+		clicon_log(LOG_WARNING, "Warning: Augment failed in module %s: node %s %d cannot be added to target node %s",
 			   yang_argument_get(ys_module(ys)),
 			   yang_key2str(childkey),
 			   childkey,
diff --git a/test/test_api.sh b/test/test_api.sh
index 92d90612..a0a53dea 100755
--- a/test/test_api.sh
+++ b/test/test_api.sh
@@ -259,19 +259,17 @@ if [ $RC -ne 0 ]; then
     stop_restconf
 fi
 
-if [ $BE -eq 0 ]; then
-    exit # BE
+if [ $BE -ne 0 ]; then
+    new "Kill backend"
+    # Check if premature kill
+    pid=`pgrep -u root -f clixon_backend`
+    if [ -z "$pid" ]; then
+	err "backend already dead"
+    fi
+    # kill backend
+    stop_backend -f $cfg
 fi
 
-new "Kill backend"
-# Check if premature kill
-pid=`pgrep -u root -f clixon_backend`
-if [ -z "$pid" ]; then
-    err "backend already dead"
-fi
-# kill backend
-stop_backend -f $cfg
-
 # unset conditional parameters 
 unset format
 
diff --git a/test/test_augment.sh b/test/test_augment.sh
index 2b0d2909..2f5adb7b 100755
--- a/test/test_augment.sh
+++ b/test/test_augment.sh
@@ -85,6 +85,20 @@ module ietf-interfaces {
          type uint16;
        }
    }
+   /* Original choice that gets augmented */
+   choice target {
+      case stream {
+        leaf one{
+           type string;
+        }
+      }
+   }
+   notification started {
+     leaf id{
+       type string;
+     }
+   }
+
 }
 EOF
 
@@ -145,6 +159,9 @@ module example-augment {
             refine port {
               default 80;
             }
+            refine ip {
+	      description "double refine triggered mem error";             
+            }
           }
           uses localgroup {
             description "Use a local grouping defining lip and lport";
@@ -153,7 +170,22 @@ module example-augment {
             }
           }
        }
+       /* augment choice */
+       augment "/if:target" {
+           case datastore {
+	      leaf two{
+                 type uint32;
+              }
+           }
+       }
+       /* augment notification */
+       augment "/if:started" {
+          leaf argument{
+             type string;
+          }
+       }
 }
+
 EOF
 
 new "test params: -f $cfg"
diff --git a/test/test_submodule.sh b/test/test_submodule.sh
index 46fd88b0..fd2e0969 100755
--- a/test/test_submodule.sh
+++ b/test/test_submodule.sh
@@ -66,6 +66,12 @@ module main{
         type string;
       }
    }
+   /* Augment something in sub module */
+   augment /ex:sub2 {
+     leaf aug0{
+        type string;
+     }
+   }
 }
 EOF
 
@@ -87,6 +93,18 @@ submodule sub1 {
         type string;
       }
    }
+   /* Augment something in module */
+   augment /ex:main {
+     leaf aug1{
+        type string;
+     }
+   }
+   /* Augment something in another submodule */
+   augment /ex:sub2 {
+     leaf aug2{
+        type string;
+     }
+   }
 }
 EOF
 
@@ -221,6 +239,15 @@ expectpart "$(curl $CURLOPTS -X POST -H "Content-Type: application/yang-data+jso
 new "restconf check main/sub1/sub2 contents"
 expectpart "$(curl $CURLOPTS -X GET $RCPROTO://localhost/restconf/data?content=config)" 0 'HTTP/1.1 200 OK' '{"data":{"main:main":{"ext":"foo","x":"foo"},"main:sub1":{"ext1":"foo","x":"foo"},"main:sub2":{"ext2":"foo","x":"foo"}'
 
+new "restconf edit augment 0"
+expectpart "$(curl $CURLOPTS -X POST -H "Content-Type: application/yang-data+json" $RCPROTO://localhost/restconf/data/main:sub2 -d '{"main:aug0":"foo"}')" 0 'HTTP/1.1 201 Created'
+
+new "restconf edit augment 1"
+expectpart "$(curl $CURLOPTS -X POST -H "Content-Type: application/yang-data+json" $RCPROTO://localhost/restconf/data/main:main -d '{"main:aug1":"foo"}')" 0 'HTTP/1.1 201 Created'
+
+new "restconf edit augment 2"
+expectpart "$(curl $CURLOPTS -X POST -H "Content-Type: application/yang-data+json" $RCPROTO://localhost/restconf/data/main:sub2 -d '{"main:aug2":"foo"}')" 0 'HTTP/1.1 201 Created'
+
 if [ $RC -ne 0 ]; then
     new "Kill restconf daemon"
     stop_restconf
diff --git a/test/test_yang_models.sh b/test/test_yang_models_ieee.sh
similarity index 51%
rename from test/test_yang_models.sh
rename to test/test_yang_models_ieee.sh
index 839214ec..11533479 100755
--- a/test/test_yang_models.sh
+++ b/test/test_yang_models_ieee.sh
@@ -1,20 +1,10 @@
 #!/usr/bin/env bash
-# Parse yangmodels from https://github.com/YangModels/yang
+# Parse "all" IEEE yangmodels from https://github.com/YangModels/yang/standard/ietf/RFC
 # Notes:
+# - Only a simple smoketest (CLI check) is made, A full system may not work
 # - Env variable YANGMODELS should point to checkout place. (define it in site.sh for example)
-# - Only cisco/nx/9.2-2 # Many other versions
-# - Only cisco/xe/1631  # Many other versions
-# - Only cisco/xr/530   # Many other versions
-# - Only juniper/18.2/18.2R/junos # Many other versions and platoforms
-
-# These are the test scripts:
-#./experimental/ieee/check.sh
-#./standard/ieee/check.sh
-#./standard/ietf/check.sh
-#./vendor/cisco/xr/check.sh
-#./vendor/cisco/check.sh
-#./vendor/cisco/xe/check.sh
-#./vendor/cisco/nx/check.sh
+# - Some FEATURES are set to make it work
+# - Some DIFFs are necessary in yangmodels (see end of script)
 
 # Magic line must be first in script (see README.md)
 s="$_" ; . ./lib.sh || if [ "$s" = $0 ]; then exit 0; else return 0; fi
@@ -35,27 +25,24 @@ cat <<EOF > $cfg
 <clixon-config xmlns="http://clicon.org/config">
   <CLICON_CONFIGFILE>$cfg</CLICON_CONFIGFILE>
   <CLICON_FEATURE>ni-ieee1588-ptp:cmlds</CLICON_FEATURE>
-  <CLICON_FEATURE>ietf-alarms:alarm-shelving</CLICON_FEATURE>
+  <CLICON_YANG_DIR>/usr/local/share/clixon</CLICON_YANG_DIR>
   <CLICON_YANG_DIR>$YANGMODELS/standard/ietf/RFC</CLICON_YANG_DIR>
   <CLICON_YANG_DIR>$YANGMODELS/standard/ieee/draft/802.1/Qcr</CLICON_YANG_DIR> 
   <CLICON_YANG_DIR>$YANGMODELS/standard/ieee/draft/802</CLICON_YANG_DIR> 
-  <CLICON_YANG_DIR>$YANGMODELS/standard/ieee/draft/802</CLICON_YANG_DIR> 
   <CLICON_YANG_DIR>$YANGMODELS/standard/ieee/published/802.1</CLICON_YANG_DIR> 
   <CLICON_YANG_DIR>$YANGMODELS/standard/ieee/published/802</CLICON_YANG_DIR> 
-  <CLICON_YANG_DIR>/usr/local/share/clixon</CLICON_YANG_DIR>
-  <CLICON_YANG_LIST_CHECK>false</CLICON_YANG_LIST_CHECK>
   <CLICON_CLISPEC_DIR>/usr/local/lib/$APPNAME/clispec</CLICON_CLISPEC_DIR>
   <CLICON_CLI_DIR>/usr/local/lib/$APPNAME/cli</CLICON_CLI_DIR>
   <CLICON_CLI_MODE>$APPNAME</CLICON_CLI_MODE>
   <CLICON_SOCK>/usr/local/var/$APPNAME/$APPNAME.sock</CLICON_SOCK>
   <CLICON_BACKEND_PIDFILE>/usr/local/var/$APPNAME/$APPNAME.pidfile</CLICON_BACKEND_PIDFILE>
   <CLICON_XMLDB_DIR>/usr/local/var/$APPNAME</CLICON_XMLDB_DIR>
-  <CLICON_MODULE_LIBRARY_RFC7895>true</CLICON_MODULE_LIBRARY_RFC7895>
 </clixon-config>
 EOF
 
 new "yangmodels parse: -f $cfg"
 
+
 new "yangmodel Experimental IEEE 802.1: $YANGMODELS/experimental/ieee/802.1"
 expectpart "$($clixon_cli -D $DBG -1f $cfg -o CLICON_YANG_MAIN_DIR=$YANGMODELS/experimental/ieee/802.1 -p $YANGMODELS/experimental/ieee/1588 show version)" 0 "$version."
 
@@ -85,56 +72,22 @@ expectpart "$($clixon_cli -D $DBG -1f $cfg -o CLICON_YANG_MAIN_DIR=$YANGMODELS/s
 new "yangmodel Standard IEEE 802.1: $YANGMODELS/standard/ieee/published/802.3"
 expectpart "$($clixon_cli -D $DBG -1f $cfg -o CLICON_YANG_MAIN_DIR=$YANGMODELS/standard/ieee/published/802.3 show version)" 0 "$version."
 
-# Standard IETF
-# XXX fails on augmenting "action"
-new "yangmodel Standard IETF: $YANGMODELS/standard/ietf/RFC"
-expectpart "$($clixon_cli -D $DBG -1f $cfg -o CLICON_YANG_MAIN_DIR=$YANGMODELS/standard/ietf/RFC show version)" 0 "$version."
-
-# vendor/junos
-#junos           : M/MX, T/TX, Some EX platforms, ACX
-#junos-es        : SRX, Jseries, LN-*
-#junos-ex        : EX series
-#junos-qfx       : QFX series
-#junos-nfx       : NFX series
-
-# Juniper JunOS. Junos files have 4 lines copyright, then "<space>module" on
-# line 5. No sub-modules.
-# NOTE: We DISABLE CLI generation, because some juniper are very large.
-# and cli generation consumes memory.
-# For example (100K lines):
-#wc /usr/local/share/yangmodels/vendor/juniper/18.2/18.2R1/junos/conf/junos-conf-system@2018-01-01.yang
-#  92853  274279 3228229 /usr/local/share/yangmodels/vendor/juniper/18.2/18.2R1/junos/conf/junos-conf-system@2018-01-01.yan
-# But junos-conf-logical-systems@2018-01-01.yang takes longest time
-
-files=$(find $YANGMODELS/vendor/juniper/18.2/18.2R1/junos/conf -name "*.yang")
-let i=0;
-for f in $files; do
-    if [ -n "$(head -5 $f|grep '^ module')" ]; then
-	new "$clixon_cli -1f $cfg -o CLICON_YANG_MAIN_FILE=$f -p $YANGMODELS/vendor/juniper/18.2/18.2R1/common -p $YANGMODELS/vendor/juniper/18.2/18.2R1/junos/conf show version"
-	expectpart "$($clixon_cli -D $DBG -1f $cfg -o CLICON_YANG_MAIN_FILE=$f -p $YANGMODELS/vendor/juniper/18.2/18.2R1/common -p $YANGMODELS/vendor/juniper/18.2/18.2R1/junos/conf -o CLICON_CLI_GENMODEL=0 show version)" 0 "$version."
-	let i++;
-	sleep 1
-    fi
-done
-
-# We skip CISCO because we have errors that vilates the RFC (I think)
-# eg: Test 7(7) [yangmodel vendor cisco xr 623: /usr/local/share/yangmodels/vendor/cisco/xr/623]
-#  yang_abs_schema_nodeid: Absolute schema nodeid /bgp-rib/afi-safis/afi-safi/ipv4-unicast/loc-rib must have prefix
-
-if false; then
-# vendor/cisco/xr
-new "yangmodel vendor cisco xr 623: $YANGMODELS/vendor/cisco/xr/623"
-expectpart "$($clixon_cli -D $DBG -1f $cfg -o CLICON_YANG_MAIN_DIR=$YANGMODELS/vendor/cisco/xr/623 show version)" 0 "$version."
-
-new "yangmodel vendor cisco xr 632: $YANGMODELS/vendor/cisco/xr/632"
-expectpart "$($clixon_cli -D $DBG -1f $cfg -o CLICON_YANG_MAIN_DIR=$YANGMODELS/vendor/cisco/xr/632 show version)" 0 "$version."
-
-new "yangmodel vendor cisco xr 623: $YANGMODELS/vendor/cisco/xr/642"
-expectpart "$($clixon_cli -D $DBG -1f $cfg -o CLICON_YANG_MAIN_DIR=$YANGMODELS/vendor/cisco/xr/642 show version)" 0 "$version."
-
-new "yangmodel vendor cisco xr 651: $YANGMODELS/vendor/cisco/xr/651"
-expectpart "$($clixon_cli -D $DBG -1f $cfg -o CLICON_YANG_MAIN_DIR=$YANGMODELS/vendor/cisco/xr/651 show version)" 0 "$version."
-fi ### cisco
-
 rm -rf $dir
 
+exit 0
+
+# Diff to make it work
+
+diff --git a/standard/ieee/published/802.3/ieee802-ethernet-pon.yang b/standard/ieee/published/802.3/ieee802-ethernet-pon.yang
+index 37c54c2a..a56b5f50 100755
+--- a/standard/ieee/published/802.3/ieee802-ethernet-pon.yang
++++ b/standard/ieee/published/802.3/ieee802-ethernet-pon.yang
+@@ -2421,7 +2421,7 @@ module ieee802-ethernet-pon {
+     }
+ 
+     leaf mpcp-maximum-queue-count-per-report {
+-      when "../ompe-mode = olt'";
++      when "../ompe-mode = 'olt'";^M
+       type mpcp-maximum-queue-count-per-report;
+ 
+       config false;
diff --git a/test/test_yang_models_ietf.sh b/test/test_yang_models_ietf.sh
new file mode 100755
index 00000000..81015141
--- /dev/null
+++ b/test/test_yang_models_ietf.sh
@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+# Parse "all" IETF yangmodels from https://github.com/YangModels/yang/standard/ieee and experimental/ieee
+# Notes:
+# - Only a simple smoketest (CLI check) is made, A full system may not work
+# - Env variable YANGMODELS should point to checkout place. (define it in site.sh for example)
+# - Some FEATURES are set to make it work
+# - Some DIFFs are necessary in yangmodels (see end of script)
+
+# Magic line must be first in script (see README.md)
+s="$_" ; . ./lib.sh || if [ "$s" = $0 ]; then exit 0; else return 0; fi
+
+# Yang specifics: multi-keys and empty type
+APPNAME=example
+
+cfg=$dir/conf_yang.xml
+fyang=$dir/test.yang
+
+YANGMODELS=/home/olof/tmp/yang
+if [ ! -d "$YANGMODELS" ]; then
+#    err "Hmm Yangmodels dir does not seem to exist, try git clone https://github.com/YangModels/yang?"
+    if [ "$s" = $0 ]; then exit 0; else return 0; fi
+fi
+
+cat <<EOF > $cfg
+<clixon-config xmlns="http://clicon.org/config">
+  <CLICON_CONFIGFILE>$cfg</CLICON_CONFIGFILE>
+  <CLICON_FEATURE>ietf-alarms:alarm-shelving</CLICON_FEATURE>
+  <CLICON_FEATURE>ietf-subscribed-notifications:configured</CLICON_FEATURE>
+  <CLICON_FEATURE>ietf-subscribed-notifications:replay</CLICON_FEATURE>
+  <CLICON_FEATURE>ietf-access-control-list:match-on-tcp</CLICON_FEATURE>
+  <CLICON_YANG_DIR>/usr/local/share/clixon</CLICON_YANG_DIR>
+  <CLICON_YANG_DIR>$YANGMODELS/standard/ieee/published/802.1</CLICON_YANG_DIR> 
+  <CLICON_CLISPEC_DIR>/usr/local/lib/$APPNAME/clispec</CLICON_CLISPEC_DIR>
+  <CLICON_CLI_DIR>/usr/local/lib/$APPNAME/cli</CLICON_CLI_DIR>
+  <CLICON_CLI_MODE>$APPNAME</CLICON_CLI_MODE>
+  <CLICON_SOCK>/usr/local/var/$APPNAME/$APPNAME.sock</CLICON_SOCK>
+  <CLICON_BACKEND_PIDFILE>/usr/local/var/$APPNAME/$APPNAME.pidfile</CLICON_BACKEND_PIDFILE>
+  <CLICON_XMLDB_DIR>/usr/local/var/$APPNAME</CLICON_XMLDB_DIR>
+</clixon-config>
+EOF
+
+# Standard IETF
+new "yangmodel Standard IETF: $YANGMODELS/standard/ietf/RFC"
+echo "$clixon_cli -D $DBG -1f $cfg -o CLICON_YANG_MAIN_DIR=$YANGMODELS/standard/ietf/RFC show version"
+expectpart "$($clixon_cli -D $DBG -1f $cfg -o CLICON_YANG_MAIN_DIR=$YANGMODELS/standard/ietf/RFC show version)" 0 "$version."
+
+rm -rf $dir
+
+exit 0
+
+# Diff to make it work
+
+diff --git a/standard/ietf/RFC/ietf-mud@2019-01-28.yang b/standard/ietf/RFC/ietf-mud@2019-01-28.yang
+index 1842284e..4197ad46 100644
+--- a/standard/ietf/RFC/ietf-mud@2019-01-28.yang
++++ b/standard/ietf/RFC/ietf-mud@2019-01-28.yang
+@@ -297,7 +297,7 @@ module ietf-mud {
+     }
+   }
+   augment "/acl:acls/acl:acl/acl:aces/acl:ace/acl:matches"
+-        + "/acl:l4/acl:tcp/acl:tcp" {
++      + "/acl:l4/acl:tcp" { /* Olof: rm extra /acl:tcp */
+     description
+       "add direction-initiated";
+     leaf direction-initiated {