diff --git a/src/main/java/net/geant/nmaas/portal/api/market/ApplicationController.java b/src/main/java/net/geant/nmaas/portal/api/market/ApplicationController.java
index 90f1bbfe7b57d3542f233591baa93d1bf2935e6c..c692031f4496b13b4931db3cbfb46c5837d1bab8 100644
--- a/src/main/java/net/geant/nmaas/portal/api/market/ApplicationController.java
+++ b/src/main/java/net/geant/nmaas/portal/api/market/ApplicationController.java
@@ -326,7 +326,7 @@ public class ApplicationController extends AppBaseController {
 						numberOfRunningInstances = +1;
 					}
 					if(numberOfRunningInstances > 0) {
-						throw new ProcessingException("Can not delete app version. You still have " + numberOfRunningInstances + " running instances of this version.");
+						throw new ProcessingException("Can not set state to Disabled. There is still " + numberOfRunningInstances + " running instances of this version.");
 					}
 			}
 			);