Index: trunk/Ohana/src/imregister/detrend/output.c
===================================================================
--- trunk/Ohana/src/imregister/detrend/output.c	(revision 95)
+++ trunk/Ohana/src/imregister/detrend/output.c	(revision 2450)
@@ -219,5 +219,5 @@
     filtstr = filterhash[MIN (MAX (detdata[i].filter, 0), NFILTER - 1)];
 
-    if (detdata[i].mode == M_SPLIT) {
+    if ((detdata[i].mode == M_SPLIT) && (detdata[i].ccd >= -1) && (detdata[i].ccd < Nccd)) {
       ccdstr   = ccds[detdata[i].ccd];
     } else {