Index: trunk/src/libcschem/integrity.c
===================================================================
--- trunk/src/libcschem/integrity.c	(revision 10315)
+++ trunk/src/libcschem/integrity.c	(revision 10316)
@@ -43,16 +43,19 @@
 
 static void igy_brk() {}
 
-#define ASSERT(expr, reason) \
+#define ASSERT1(expr, reason, arg1) \
 	do { \
 		if (!(expr)) { \
 			const char *sheetname = sheet->hidlib.loadname; \
-			rnd_message(RND_MSG_ERROR,  "Integrity violation: " reason " (" #expr ") at " CSCH_IGY_LOC  ", sheet: %s; called from: %s\n", sheetname, called_from); \
+			rnd_message(RND_MSG_ERROR,  "Integrity violation: " reason, arg1); \
+			rnd_message(RND_MSG_ERROR,  " (" #expr ") at " CSCH_IGY_LOC  ", sheet: %s; called from: %s\n", sheetname, called_from); \
 			igy_brk(); \
 			res |= 1; \
 		} \
 	} while(0)
 
+#define ASSERT(expr, reason) ASSERT1(expr, reason, NULL)
+
 RND_INLINE int igy_cnc_grp(void *parent, csch_cgrp_t *grp, const char *called_from);
 
 RND_INLINE int igy_cnc_conn(void *parent, csch_conn_t *c, const char *called_from)