Index: trunk/ippTasks/detrend.norm.pro
===================================================================
--- trunk/ippTasks/detrend.norm.pro	(revision 12369)
+++ trunk/ippTasks/detrend.norm.pro	(revision 12370)
@@ -164,5 +164,5 @@
     end
 
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -176,5 +176,5 @@
 
     $run = detrend_norm_calc.pl --det_id $DET_ID --iteration $ITERATION --det_type $DET_TYPE $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end
@@ -287,5 +287,5 @@
 
     # XXX use ipp_filename.pl to lookup output file names
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -299,5 +299,5 @@
 
     $run = detrend_norm_apply.pl --det_id $DET_ID --iteration $ITERATION --class_id $CLASS_ID --value $NORM --input_uri $URI --camera $CAMERA --det_type $DET_TYPE $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end
@@ -407,5 +407,5 @@
 
     # XXX add $WORKDIR/$LOG_DIR
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -419,5 +419,5 @@
 
     $run = detrend_norm_exp.pl --det_id $DET_ID --iteration $ITERATION --camera $CAMERA --det_type $DET_TYPE  $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end