Index: trunk/psModules/src/detrend/pmDark.c
===================================================================
--- trunk/psModules/src/detrend/pmDark.c	(revision 40454)
+++ trunk/psModules/src/detrend/pmDark.c	(revision 42379)
@@ -129,5 +129,5 @@
     } else {
         if (!ordinateParseConcept(value, readout, name)) {
-            psError(PM_ERR_CONFIG, false, "trouble parsing rule %s for DARK.ORDINATE %s", rule, name);
+            psError(PM_ERR_CONFIG, false, "trouble parsing rule %s for DARK.ORDINATE %s", "NULL", name);
             return false;
         }