diff --git a/VERSION b/VERSION
index 24bead74..c34f2dd4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.3.632
+8.3.633
diff --git a/resis/ResRex.c b/resis/ResRex.c
index f85ff5b1..98bcfd30 100644
--- a/resis/ResRex.c
+++ b/resis/ResRex.c
@@ -1356,7 +1356,7 @@ ResFixUpConnections(extDev, layoutDev, extNode, nodename)
     }
     if (extDev->subs == extNode)
     {
-	if ((subs = layoutDev->rd_fet_subs) != NULL)
+	if ((layoutDev->rd_nterms >= 4) && ((subs = layoutDev->rd_fet_subs) != NULL))
 	{
 	    if (subs->rn_name != NULL && notdecremented)
 	    {
diff --git a/resis/ResSimple.c b/resis/ResSimple.c
index 9099da25..700345f5 100644
--- a/resis/ResSimple.c
+++ b/resis/ResSimple.c
@@ -386,7 +386,7 @@ ResMoveDevices(node1, node2)
 	devptr = devptr->te_nextt;
 	if (device->rd_fet_gate == node1)
    	    device->rd_fet_gate = node2;
-	else if (device->rd_fet_subs == node1)
+	else if ((device->rd_nterms >= 4) && (device->rd_fet_subs == node1))
    	    device->rd_fet_subs = node2;
 	else if (device->rd_fet_source == node1)
 	    device->rd_fet_source = node2;