Index: /trunk/ippTasks/camera.pro
===================================================================
--- /trunk/ippTasks/camera.pro	(revision 12369)
+++ /trunk/ippTasks/camera.pro	(revision 12370)
@@ -132,5 +132,5 @@
 
     # output log from filerule
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -144,5 +144,5 @@
 
     $run = camera_exp.pl --exp_id $EXP_ID --cam_id $CAM_ID --camera $CAMERA $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end
Index: /trunk/ippTasks/chip.pro
===================================================================
--- /trunk/ippTasks/chip.pro	(revision 12369)
+++ /trunk/ippTasks/chip.pro	(revision 12370)
@@ -135,5 +135,5 @@
 
     ## generate output log based on filerule
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -147,5 +147,5 @@
 
     $run = chip_imfile.pl --exp_id $EXP_ID --chip_id $CHIP_ID --class_id $CLASS_ID --uri $URI --camera $CAMERA $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end
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
Index: /trunk/ippTasks/detrend.process.pro
===================================================================
--- /trunk/ippTasks/detrend.process.pro	(revision 12369)
+++ /trunk/ippTasks/detrend.process.pro	(revision 12370)
@@ -154,5 +154,5 @@
 
     ## output log filename
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -166,5 +166,5 @@
 
     $run = detrend_process_imfile.pl --det_id $DET_ID --det_type $DET_TYPE --exp_tag $EXP_TAG --class_id $CLASS_ID --input_uri $URI --camera $CAMERA $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end
@@ -276,5 +276,5 @@
 
     # XXX push this into the filerules?
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -288,5 +288,5 @@
 
     $run = detrend_process_exp.pl --det_id $DET_ID --exp_tag $EXP_TAG --camera $CAMERA $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end
Index: /trunk/ippTasks/detrend.reject.pro
===================================================================
--- /trunk/ippTasks/detrend.reject.pro	(revision 12369)
+++ /trunk/ippTasks/detrend.reject.pro	(revision 12370)
@@ -133,5 +133,5 @@
     end
 
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -145,5 +145,5 @@
 
     $run = detrend_reject_exp.pl --det_id $DET_ID --iteration $ITERATION --det_type $DET_TYPE --camera $CAMERA $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end
Index: /trunk/ippTasks/detrend.resid.pro
===================================================================
--- /trunk/ippTasks/detrend.resid.pro	(revision 12369)
+++ /trunk/ippTasks/detrend.resid.pro	(revision 12370)
@@ -154,5 +154,5 @@
 
     # XXX use ipp_filename.pl to lookup output file names
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -166,5 +166,5 @@
 
     $run = detrend_resid.pl --det_id $DET_ID --iteration $ITERATION --exp_tag $EXP_TAG --class_id $CLASS_ID --det_type $DET_TYPE --detrend $DET_URI --input_uri $URI --camera $CAMERA --mode $MODE $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end
@@ -277,5 +277,5 @@
 
     # XXX use ipp_filename.pl to lookup output file names
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -289,5 +289,5 @@
 
     $run = detrend_reject_imfile.pl --det_id $DET_ID --iteration $ITERATION --exp_tag $EXP_TAG --det_type $DET_TYPE --camera $CAMERA $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end
Index: /trunk/ippTasks/detrend.stack.pro
===================================================================
--- /trunk/ippTasks/detrend.stack.pro	(revision 12369)
+++ /trunk/ippTasks/detrend.stack.pro	(revision 12370)
@@ -134,5 +134,5 @@
     end
 
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -149,5 +149,5 @@
 
     $run = detrend_stack.pl --det_id $DET_ID --iteration $ITERATION --class_id $CLASS_ID --det_type $DET_TYPE --camera $CAMERA $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end
Index: /trunk/ippTasks/diff.pro
===================================================================
--- /trunk/ippTasks/diff.pro	(revision 12369)
+++ /trunk/ippTasks/diff.pro	(revision 12370)
@@ -141,5 +141,5 @@
 
     ## generate output log based on filerule
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -153,5 +153,5 @@
 
     $run = diff_skycell.pl --diff_id $DIFF_ID $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end
Index: /trunk/ippTasks/stack.pro
===================================================================
--- /trunk/ippTasks/stack.pro	(revision 12369)
+++ /trunk/ippTasks/stack.pro	(revision 12370)
@@ -141,5 +141,5 @@
 
     ## generate output log based on filerule
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -153,5 +153,5 @@
 
     $run = stack_skycell.pl --stack_id $STACK_ID $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end
Index: /trunk/ippTasks/warp.pro
===================================================================
--- /trunk/ippTasks/warp.pro	(revision 12369)
+++ /trunk/ippTasks/warp.pro	(revision 12370)
@@ -158,5 +158,5 @@
 
     ## generate output log based on filerule
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -170,5 +170,5 @@
 
     $run = warp_overlap.pl --warp_id $WARP_ID --camera $CAMERA $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $WORKDIR
     end
@@ -281,5 +281,5 @@
 
     ## generate output log based on filerule
-    if ($WORKDIR == NULL)
+    if ("$WORKDIR" == "NULL")
       $outroot = `pwd`
     else
@@ -293,5 +293,5 @@
 
     $run = warp_skycell.pl --warp_id $WARP_ID --skycell_id $SKYCELL_ID --tess_id $TESS_ID --camera $CAMERA $ARGS
-    if ($WORKDIR != NULL)
+    if ("$WORKDIR" != "NULL")
       $run = $run --workdir $outroot
     end