Index: read.c
===================================================================
--- read.c	(revision 29681)
+++ read.c	(revision 29682)
@@ -1181,7 +1181,7 @@
 		const pcb_dflgmap_t *m;
 
 		while(ctx->pcb->LayerGroups.len > 0)
-			pcb_layergrp_del(ctx->pcb, 0, 1);
+			pcb_layergrp_del(ctx->pcb, 0, 1, 0);
 
 		for(m = pcb_dflg_top_noncop; m->name != NULL; m++) map[len++] = *m;