Index: trunk/src/plug_io.c
===================================================================
--- trunk/src/plug_io.c	(revision 14095)
+++ trunk/src/plug_io.c	(revision 14096)
@@ -1022,6 +1022,13 @@
 	}
 }
 
+pcb_cardinal_t pcb_io_incompat_save(pcb_data_t *data, pcb_any_obj_t *obj, const char *desc, const char *hint)
+{
+	pcb_message(PCB_MSG_ERROR, "save error: %s\n(%s)\n", desc, hint);
+	return 0;
+}
+
+
 void pcb_io_uninit(void)
 {
 	free(last_design_dir);
Index: trunk/src/plug_io.h
===================================================================
--- trunk/src/plug_io.h	(revision 14095)
+++ trunk/src/plug_io.h	(revision 14096)
@@ -183,6 +183,11 @@
 } pcb_find_io_t;
 int pcb_find_io(pcb_find_io_t *available, int avail_len, pcb_plug_iot_t typ, int is_wr, const char *fmt);
 
+/* Indicate an incompatibility on save; data and obj may be NULL (they are
+   used for navigating the user to the problem). Desc should be a short
+   description, details should go in hint. Returns a report ID. */
+pcb_cardinal_t pcb_io_incompat_save(pcb_data_t *data, pcb_any_obj_t *obj, const char *desc, const char *hint);
+
 void pcb_io_uninit(void);
 
 #endif