diff --git a/VERSION b/VERSION
index e14e457c..1f5b7e5b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.3.313
+8.3.314
diff --git a/extflat/EFantenna.c b/extflat/EFantenna.c
index dc127cfa..419712df 100644
--- a/extflat/EFantenna.c
+++ b/extflat/EFantenna.c
@@ -224,7 +224,7 @@ CmdAntennaCheck(w, cmd)
     }
 
     /* Convert the hierarchical description to a flat one */
-    flatFlags = EF_FLATNODES;
+    flatFlags = EF_FLATNODES | EF_WARNABSTRACT;
     TxPrintf("Building flattened netlist.\n");
     EFFlatBuild(inName, flatFlags);
 
diff --git a/extflat/EFflat.c b/extflat/EFflat.c
index 1f2f82d5..6aaab538 100644
--- a/extflat/EFflat.c
+++ b/extflat/EFflat.c
@@ -66,6 +66,7 @@ int efAddOneConn(HierContext *, char *, char *, Connection *, bool);
 
 #define FLATNODE_STDCELL    0x01
 #define FLATNODE_DOWARN	    0x02
+#define FLATNODE_NOABSTRACT 0x04
 
 
 /*
@@ -129,6 +130,10 @@ EFFlatBuild(name, flags)
 
     if (flags & EF_FLATNODES)
     {
+	int flatnodeflags = 0;
+	if (flags & EF_WARNABSTRACT)
+	    flatnodeflags = FLATNODE_NOABSTRACT;
+
 	if (flags & EF_NOFLATSUBCKT)
 	{
 	    /* The top cell must always have the DEF_SUBCIRCUIT flag cleared */
@@ -137,8 +142,8 @@ EFFlatBuild(name, flags)
 	}
 	else
 	{
-	    int flags = FLATNODE_DOWARN;    /* No FLATNODE_STDCELL flag */
-	    efFlatNodes(&efFlatContext, (ClientData)flags);
+	    flatnodeflags |= FLATNODE_DOWARN;    /* No FLATNODE_STDCELL flag */
+	    efFlatNodes(&efFlatContext, (ClientData)flatnodeflags);
 	}
 	efFlatKills(&efFlatContext);
 	if (!(flags & EF_NONAMEMERGE))
@@ -316,6 +321,14 @@ efFlatNodes(hc, clientData)
     bool stdcell = (flags & FLATNODE_STDCELL) ? TRUE : FALSE;
     bool doWarn = (flags & FLATNODE_DOWARN) ? TRUE : FALSE;
 
+    if (flags & FLATNODE_NOABSTRACT)
+    {
+    	Def *def = hc->hc_use->use_def;
+	if (def->def_flags & DEF_ABSTRACT)
+	    TxError("Error:  Cell %s was extracted as an abstract view.\n",
+			def->def_name);
+    }
+
     (void) efHierSrUses(hc, efFlatNodes, clientData);
 
     /* Add all our own nodes to the table */
diff --git a/extflat/extflat.h b/extflat/extflat.h
index d1962a4b..7de836e6 100644
--- a/extflat/extflat.h
+++ b/extflat/extflat.h
@@ -36,6 +36,7 @@ typedef unsigned char U_char;
 #define	EF_NOFLATSUBCKT		0x10	/* Don't flatten standard cells */
 #define	EF_NONAMEMERGE		0x20	/* Don't merge unconnected nets	*/
 					/* with the same name.		*/
+#define EF_WARNABSTRACT		0x40	/* Warn if subcell is abstract	*/
 
 /* Flags to control output of node names.  Stored in EFOutputFlags */
 #define EF_TRIM_MASK		0x1f	/* Mask for handling name trimming */