diff --git a/bin/build.sh b/bin/build.sh
index 7bf4d4a..e14cd12 100755
--- a/bin/build.sh
+++ b/bin/build.sh
@@ -178,10 +178,16 @@ make_ocs_bin()
 
 make_cook_ocs_bin_in_ub12()
 {
-    if [ "$(docker ps -a -f name=ubuntu12-dev -f status=exited -q)" ]; then
-        docker start ubuntu12-dev
+    container_id=$(docker ps -a -f name=ubuntu12-dev -q)
+    if [ -n "$container_id" ]; then
+        if [ "$(docker ps -a -f name=ubuntu12-dev -f status=exited -q)" ]; then
+            docker start ubuntu12-dev
+        fi
+        docker exec -it ubuntu12-dev /bin/bash -c "cd ~/ocs.git/build/bin && ./build.sh ocs -t cook"
+    else
+        echo "Error: Container 'ubuntu12-dev' does not exist. Please create it before running this script."
+        exit 1
     fi
-    docker exec -it ubuntu12-dev /bin/bash -c "cd ~/ocs.git/build/bin && ./build.sh ocs -t cook"
 }
 
 make_cproxy_bin()