Index: trunk/psModules/src/imcombine/pmSubtraction.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtraction.c	(revision 17383)
+++ trunk/psModules/src/imcombine/pmSubtraction.c	(revision 17387)
@@ -4,6 +4,6 @@
  *  @author GLG, MHPCC
  *
- *  @version $Revision: 1.86 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2008-04-08 03:03:19 $
+ *  @version $Revision: 1.87 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2008-04-08 03:10:29 $
  *
  *  Copyright 2004-2007 Institute for Astronomy, University of Hawaii
@@ -648,5 +648,5 @@
         y0 = ro1->row0;
     }
-    if (kernels->mode != PM_SUBTRACTION_MODE_2 || kernels->mode == PM_SUBTRACTION_MODE_DUAL) {
+    if (kernels->mode == PM_SUBTRACTION_MODE_2 || kernels->mode == PM_SUBTRACTION_MODE_DUAL) {
         PM_ASSERT_READOUT_NON_NULL(out2, false);
         PM_ASSERT_READOUT_NON_NULL(ro2, false);