diff --git a/dockerfiles/scripts/compress_graph.sh b/dockerfiles/scripts/compress_graph.sh
index fe43ef4..5078693 100755
--- a/dockerfiles/scripts/compress_graph.sh
+++ b/dockerfiles/scripts/compress_graph.sh
@@ -1,87 +1,92 @@
 #!/bin/bash
 
 usage() {
     echo "Usage: --input <graph path> --output <out dir> --lib <graph lib dir>"
     echo "  options:"
     echo "    -t, --tmp <temporary dir> (default to /tmp/)"
     echo "    --stdout  <stdout file> (default to ./stdout)"
     echo "    --stderr  <stderr file> (default to ./stderr)"
     exit 1
 }
 
 graph_path=""
 out_dir=""
 lib_dir=""
 tmp_dir="/tmp/"
 stdout_file="stdout"
 stderr_file="stderr"
 while (( "$#" )); do
     case "$1" in
         -i|--input) shift; graph_path=$1;;
         -o|--output) shift; out_dir=$1;;
         -l|--lib) shift; lib_dir=$1;;
         -t|--tmp) shift; tmp_dir=$1;;
         --stdout) shift; stdout_file=$1;;
         --stderr) shift; stderr_file=$1;;
         *) usage;;
     esac
     shift
 done
 
 if [[ -z $graph_path || -z $out_dir || -z $lib_dir ]]; then
     usage
 fi
 
 if [[ -f "$stdout_file" || -f "$stderr_file" ]]; then
     echo "Cannot overwrite previous compression stdout/stderr files"
     exit 1
 fi
 
 dataset=$(basename $graph_path)
 compr_graph_path="$out_dir/$dataset"
 
 mkdir -p $out_dir
 mkdir -p $tmp_dir
 
 java_cmd () {
     /usr/bin/time -v java -cp $lib_dir/'*' $*
 }
 
 {
     # Build a function (MPH) that maps node names to node numbers in
     # lexicographic order (output: .mph)
     java_cmd it.unimi.dsi.sux4j.mph.GOVMinimalPerfectHashFunction       \
         --zipped $compr_graph_path.mph --temp-dir $tmp_dir              \
-        $graph_path.nodes.csv.gz                                        ;
+        $graph_path.nodes.csv.gz                                        &&
 
     # Build the graph in BVGraph format (output: .{graph,offsets,properties})
     java_cmd it.unimi.dsi.big.webgraph.ScatteredArcsASCIIGraph          \
         --function $compr_graph_path.mph --temp-dir $tmp_dir            \
-        --zipped $compr_graph_path-bv < $graph_path.edges.csv.gz        ;
+        --zipped $compr_graph_path-bv < $graph_path.edges.csv.gz        &&
     # Build the offset big-list file to load the graph faster (output: .obl)
     java_cmd it.unimi.dsi.big.webgraph.BVGraph                          \
-        --list $compr_graph_path-bv                                     ;
+        --list $compr_graph_path-bv                                     &&
 
     # Find a better permutation using a BFS traversal order (output: .order)
     java_cmd it.unimi.dsi.law.graph.BFSBig                              \
-        $compr_graph_path-bv $compr_graph_path.order                    ;
+        $compr_graph_path-bv $compr_graph_path.order                    &&
 
     # Permute the graph accordingly
-    batch_size=1000000000
+    batch_size=1000000000                                               &&
     java_cmd it.unimi.dsi.big.webgraph.Transform mapOffline             \
         $compr_graph_path-bv $compr_graph_path                          \
-        $compr_graph_path.order $batch_size                             ;
+        $compr_graph_path.order $batch_size                             &&
     java_cmd it.unimi.dsi.big.webgraph.BVGraph                          \
-        --list $compr_graph_path                                        ;
+        --list $compr_graph_path                                        &&
 
     # Compute graph statistics (output: .{indegree,outdegree,stats})
-    java_cmd it.unimi.dsi.big.webgraph.Stats $compr_graph_path          ;
+    java_cmd it.unimi.dsi.big.webgraph.Stats $compr_graph_path          &&
 
     # Create transposed graph (to allow backward traversal)
     java_cmd it.unimi.dsi.big.webgraph.Transform transposeOffline       \
-        $compr_graph_path $compr_graph_path-transposed $batch_size      ;
+        $compr_graph_path $compr_graph_path-transposed $batch_size      &&
     java_cmd it.unimi.dsi.big.webgraph.BVGraph                          \
-        --list $compr_graph_path-transposed                             ;
+        --list $compr_graph_path-transposed
 } >> $stdout_file 2>> $stderr_file
 
-echo "Graph compression done."
+if [[ $? -eq 0 ]]; then
+    echo "Graph compression done."
+else
+    echo "Graph compression failed: see $stderr_file for more info."
+    exit 1
+fi