diff --git a/lib/resourceFactory.js b/lib/resourceFactory.js
index 5422ba8c..2a7cb9b0 100644
--- a/lib/resourceFactory.js
+++ b/lib/resourceFactory.js
@@ -72,9 +72,11 @@ const resourceFactory = {
 			log.warn(`resourceFactory.createCollectionsForTree called with deprecated parameter "useNamespaces". ` +
 				`This parameter will be removed in @ui5/fs version 2.0. ` +
 				`Use parameter "getVirtualBasePathPrefix" instead`);
-			if (getVirtualBasePathPrefix) {
-				throw new Error(`resourceFactory.createCollectionsForTree called with useNamespace and getVirtualBasePathPrefix`)
-			}
+		}
+		if (useNamespaces && getVirtualBasePathPrefix) {
+			throw new Error(
+				`resourceFactory.createCollectionsForTree called with parameters "useNamespace" and ` +
+				`"getVirtualBasePathPrefix". Please provide only one of the two.`);
 		}
 
 		function processDependencies(project) {