diff --git a/RTCP/Cobalt/GPUProc/src/scripts/cobalt_functions.sh b/RTCP/Cobalt/GPUProc/src/scripts/cobalt_functions.sh
index 263ec2aef3b2e8a34becd1dbf41a4f2384eb7567..1eaac55fef6fc10fdd0a8a479f8bd2e737e62045 100755
--- a/RTCP/Cobalt/GPUProc/src/scripts/cobalt_functions.sh
+++ b/RTCP/Cobalt/GPUProc/src/scripts/cobalt_functions.sh
@@ -85,7 +85,7 @@ function read_cluster_model {
       COMPUTENODES="`ssh $HEADNODE sinfo --responding --states=idle,mixed,alloc --format=%n-ib.dragnet.infiniband.lofar,%T --noheader --partition=$SLURM_PARTITION --sort=N | fgrep -v ,draining | cut -f1 -d,`"
       if [ -z "$COMPUTENODES" ]; then
         echo "ERROR: Could not obtain list of available DRAGNET nodes. Defaulting to drg01 - drg20 -ib.dragnet.infiniband.lofar"
-        COMPUTENODES="`seq -f "drg%02-ib.dragnet.infiniband.lofar" 1 20`"
+        COMPUTENODES="`seq -f "drg%02.0f-ib.dragnet.infiniband.lofar" 1 23`"
       fi
       COMPUTENODES=$(echo $COMPUTENODES | sed -e s/dragproc-ib.dragnet.infiniband.lofar/dragproc-10g.online.lofar/g)  # dragproc has no infiniband i/f, so use 10g