Index: trunk/MagicSoft/Mars/mjtrain/MJTrainDisp.cc
===================================================================
--- trunk/MagicSoft/Mars/mjtrain/MJTrainDisp.cc	(revision 8223)
+++ trunk/MagicSoft/Mars/mjtrain/MJTrainDisp.cc	(revision 8244)
@@ -109,6 +109,8 @@
     readtst.DisableAutoScheme();
 
-    set.AddFilesOn(readtrn);
-    set.AddFilesOff(readtst);
+    if (!set.AddFilesOn(readtrn))
+        return kFALSE;
+    if (!set.AddFilesOff(readtst))
+        return kFALSE;
 
     // ----------------------- Setup Matrix ------------------