correction in motion mask script

diff --git a/scripts/create_midP_masks-2.0.sh b/scripts/create_midP_masks-2.0.sh
index 8a8babf..f5738e0 100755 (executable)
--- a/scripts/create_midP_masks-2.0.sh
+++ b/scripts/create_midP_masks-2.0.sh
@@ -147,7 +147,9 @@ motion_mask()
   cd $dir
     
   # import variables specific to each patient
-  source ./variables
+  if test -e ./variables; then
+    source ./variables
+  fi
 
   #set other global variables
   mask_dir="MASK-${resample_spacing}mm-$resample_algo"