diff --git a/src/main/java/org/gcube/portlets/user/statisticalalgorithmsimporter/server/generator/ProjectBuilder.java b/src/main/java/org/gcube/portlets/user/statisticalalgorithmsimporter/server/generator/ProjectBuilder.java
index d4aeee6..686ee98 100644
--- a/src/main/java/org/gcube/portlets/user/statisticalalgorithmsimporter/server/generator/ProjectBuilder.java
+++ b/src/main/java/org/gcube/portlets/user/statisticalalgorithmsimporter/server/generator/ProjectBuilder.java
@@ -132,16 +132,19 @@ public class ProjectBuilder {
 	}
 
 	private void createMainCodeIfRequest() throws StatAlgoImporterServiceException {
-		if (project.getMainCode() != null && project.getMainCode().getItemDescription() != null) {
-			ItemDescription mainCodeItemDescription = project.getMainCode().getItemDescription();
-			if (mainCodeItemDescription.getId() != null && !mainCodeItemDescription.getId().isEmpty()) {
-				FilesStorage filesStorage = new FilesStorage();
-				filesStorage.deleteItemOnFolder(serviceCredentials.getUserName(), mainCodeItemDescription.getId());
+		if (project.getProjectConfig() != null && project.getProjectConfig().getProjectSupport() != null
+				&& project.getProjectConfig().getProjectSupport() instanceof ProjectSupportBlackBox) {
+			if (project.getMainCode() != null && project.getMainCode().getItemDescription() != null) {
+				ItemDescription mainCodeItemDescription = project.getMainCode().getItemDescription();
+				if (mainCodeItemDescription.getId() != null && !mainCodeItemDescription.getId().isEmpty()) {
+					FilesStorage filesStorage = new FilesStorage();
+					filesStorage.deleteItemOnFolder(serviceCredentials.getUserName(), mainCodeItemDescription.getId());
+				}
 			}
+			MainGenerator mainGenerator = new MainGenerator();
+			mainGenerator.createMain(serviceCredentials, project);
 		}
 
-		MainGenerator mainGenerator = new MainGenerator();
-		mainGenerator.createMain(serviceCredentials, project);
 	}
 
 	private void repackageProjectPackage() throws StatAlgoImporterServiceException {