Index: /trunk/psModules/src/imcombine/pmSubtractionEquation.c
===================================================================
--- /trunk/psModules/src/imcombine/pmSubtractionEquation.c	(revision 24620)
+++ /trunk/psModules/src/imcombine/pmSubtractionEquation.c	(revision 24621)
@@ -865,4 +865,5 @@
         kernels->solution1 = psMatrixLUSolution(kernels->solution1, luMatrix, sumVector, permutation);
 
+#ifdef TESTING
 	// XXX double-check for NAN in data:
 	for (int ix = 0; ix < kernels->solution1->n; ix++) {
@@ -871,5 +872,5 @@
 	    }
 	}
-
+#endif
 
         psFree(sumVector);