diff --git a/prolog.d/10-GPU_allocate.sh b/prolog.d/10-GPU_allocate.sh
index 8e7f42c..b618735 100755
--- a/prolog.d/10-GPU_allocate.sh
+++ b/prolog.d/10-GPU_allocate.sh
@@ -35,7 +35,7 @@ function clean_up() {
 
 ### get requested number of GPU's
 # use hard resource list first
-NGPUS=$(qstat -j ${JOB_ID} | sed -n "s/hard resource_list:.*gpu=\([[:digit:]]\+\).*/\1/p")
+NGPUS=$(qstat -j ${JOB_ID} 2>/dev/null | sed -n "s/hard resource_list:.*gpu=\([[:digit:]]\+\).*/\1/p")
 # set NGPUS to zero if empty
 if [ -z "${NGPUS}" ] ; then
     NGPUS=0
@@ -68,4 +68,4 @@ else
 fi
 
 # clean exit
-exit 0
\ No newline at end of file
+exit 0