diff --git a/wca-integration/src/main/java/eu/itesla_project/wca/WCAImpl.java b/wca-integration/src/main/java/eu/itesla_project/wca/WCAImpl.java
index 560a3863..017f1f7f 100644
--- a/wca-integration/src/main/java/eu/itesla_project/wca/WCAImpl.java
+++ b/wca-integration/src/main/java/eu/itesla_project/wca/WCAImpl.java
@@ -360,6 +360,8 @@ public List<CommandExecution> before(Path workingDir) throws IOException {
 
                         copyRequired(workingDir);
 
+                        copyOptional(workingDir, config);
+
                         DataSource commonDataSource = new FileDataSource(workingDir, COMMONE_FILE_PREFIX);
 
                         // write uncertainies