diff --git a/VERSION b/VERSION
index 4b0033d..137ac1e 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.5.204
+1.5.203
diff --git a/base/flatten.c b/base/flatten.c
index 5b3f610..8dd7d34 100644
--- a/base/flatten.c
+++ b/base/flatten.c
@@ -259,16 +259,13 @@ int flattenInstancesOf(char *name, int fnum, char *instance)
   struct objlist *ChildObjList, *ChildListEnd;
   struct objlist *ChildStart, *ChildEnd, *ParentEnd, *ParentNext;
   struct nlist *ThisCell;
-  struct nlist *ChildCell;
+  struct  nlist *ChildCell;
   struct objlist *tmp, *ob2, *ob3;
-  int	 notdone, rnodenum;
-  char	 tmpstr[1024];
-  int	 nextnode, oldmax, numflat = 0;
-  struct objlist *myObject_p, *myPort_p;
-  struct objlist *myFirstPin_p, *myPin_p;
-  int    myDeleteCount = 0;
+  int	notdone, rnodenum;
+  char	tmpstr[1024];
+  int	nextnode, oldmax, numflat = 0;
 #if !OLDPREFIX
-  int    prefixlength;
+  int     prefixlength;
 #endif
 
   if (name == NULL) {
@@ -602,37 +599,38 @@ int flattenInstancesOf(char *name, int fnum, char *instance)
   }
   CacheNodeNames(ThisCell);
   ThisCell->dumped = 1;		/* indicate cell has been flattened */
+  {  // Remove disconnected ports. New block to ensure isolated scope.
+    // Fprintf(stdout, "DEBUG: check pins for %s of %d\n", name, fnum);
+    struct objlist *myObject_p, *myPort_p;
+    struct objlist *myFirstPin_p, *myPin_p;
+    int myDeleteCount = 0;
 
-  // Remove disconnected ports.
-  // Fprintf(stdout, "DEBUG: check pins for %s of %d\n", name, fnum);
-
-  myFirstPin_p = NULL;
-
-  // Save first pin definition so we don't have to search for each port
-  for (myObject_p = ThisCell->cell; myObject_p != NULL; myObject_p = myObject_p->next) {
-    if (myObject_p->type >= FIRSTPIN) {
-      myFirstPin_p = myObject_p;
-      break;
+    myFirstPin_p = NULL;
+    // Save first pin definition so we don't have to search for each port
+    for ( myObject_p = ThisCell->cell; myObject_p != NULL; myObject_p = myObject_p->next ) {
+      if ( myObject_p->type >= FIRSTPIN ) {
+        myFirstPin_p = myObject_p;
+        break;
+      }
     }
-  }
-  if (myFirstPin_p != NULL) {  // Not a black box. Black boxes contain no pins.
-    // For each port, check for pin connection. If none, mark for deletion. 
-    // Assumes that all ports occur at the beginning of the list
-    for (myPort_p = ThisCell->cell; myPort_p != NULL && IsPort(myPort_p);
-		myPort_p = myPort_p->next ) {
-      for (myPin_p = myFirstPin_p; myPin_p != NULL; myPin_p = myPin_p->next) {
-        if (myPort_p->node == myPin_p->node) {  // only need to find one connection
-          break;
+    if ( myFirstPin_p != NULL ) {  // not a black box. Black boxes contain no pins.
+      // For each port, check for pin connection. If none, mark for deletion. 
+      // Assumes that all ports occur at the beginning of the list
+      for ( myPort_p = ThisCell->cell; myPort_p != NULL && IsPort(myPort_p); myPort_p = myPort_p->next ) {
+        for ( myPin_p = myFirstPin_p; myPin_p != NULL; myPin_p = myPin_p->next ) {
+          if ( myPort_p->node == myPin_p->node ) {  // only need to find one connection
+            break;
+          }
+        }
+        if ( myPin_p == NULL ) {  // mark disconnected ports
+          myDeleteCount++;
+          myPort_p->node = -2;
         }
       }
-      if (myPin_p == NULL) {  // mark disconnected ports
-        myDeleteCount++;
-        myPort_p->node = -2;
+      if ( myDeleteCount > 0 ) {  // delete disconnected ports
+        CleanupPins(name, fnum);
       }
     }
-    if (myDeleteCount > 0) {  // delete disconnected ports
-      CleanupPins(name, fnum);
-    }
   }
   return numflat;
 }
@@ -1617,8 +1615,8 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 			}
 		    }
 		    else {
-		       // Apply recursive flattening when a cell exists in
-		       // one circuit but not the other.
+		       // cell exists in one circuit but not the other, so flatten it.
+		       // match = 0;
 		       break;
 		    }
 		}