diff --git a/de.prob.ui/src/de/prob/ui/operationview/CustomPreconditionDialogHandler.java b/de.prob.ui/src/de/prob/ui/operationview/CustomPreconditionDialogHandler.java
index 820b8a59732ea83e098b0bffb66eefea66d1efdc..c609f3993694cc0267666f2a2fda8c5250be6048 100644
--- a/de.prob.ui/src/de/prob/ui/operationview/CustomPreconditionDialogHandler.java
+++ b/de.prob.ui/src/de/prob/ui/operationview/CustomPreconditionDialogHandler.java
@@ -39,14 +39,8 @@ public class CustomPreconditionDialogHandler extends AbstractHandler implements
 		if (op == null)
 			return null;
 		try {
-			int hisSize = Animator.getAnimator().getHistory().size();
-			System.out.println("History Size = " + hisSize);
 			ExecuteOperationCommand
 					.executeOperation(Animator.getAnimator(), op);
-					// TODO: provide feedback when we cannot execute operation
-			if (Animator.getAnimator().getHistory().size() <= hisSize) {
-				Logger.notifyUser("Could not execute event "+ filtered.get(0).getName() + " with the additional predicate provided!");
-			}
 		} catch (ProBException e) {
 			e.notifyUserOnce();
 		}