--- src/idas/idas.c	2012-04-11 19:32:34.000000000 -0500
+++ src/idas/idas.c.fix	2014-05-21 21:24:14.934689168 -0500
@@ -7179,7 +7179,7 @@
 
 #ifndef NO_FPRINTF_OUTPUT
     fprintf(stderr, "\n[%s ERROR]  %s\n  ", module, fname);
-    fprintf(stderr, msgfmt);
+    fprintf(stderr, msgfmt,ap);
     fprintf(stderr, "\n\n");
 #endif