Index: trunk/psModules/src/pmSubtractSky.c
===================================================================
--- trunk/psModules/src/pmSubtractSky.c	(revision 2838)
+++ trunk/psModules/src/pmSubtractSky.c	(revision 2845)
@@ -6,6 +6,6 @@
  *  @author GLG, MHPCC
  *
- *  @version $Revision: 1.13 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2004-12-28 19:04:29 $
+ *  @version $Revision: 1.14 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2004-12-29 21:18:33 $
  *
  *  Copyright 2004 Maui High Performance Computing Center, University of Hawaii
@@ -423,4 +423,11 @@
     psTrace(".psModule.pmSubtractSky", 4,
             "---- pmSubtractSky() begin ----\n");
+    if ((fit != PM_FIT_NONE) &&
+            (fit != PM_FIT_POLYNOMIAL) &&
+            (fit != PM_FIT_SPLINE)) {
+        psError(PS_ERR_UNKNOWN, true, "psFit is unallowable (%d)\n", fit);
+        return(in);
+    }
+
     psStatsOptions statOptions = 0;