Hi Adhiyan,Thanks for your respond, I have resolve that issue by selecting an action which I have forgotten to pick, I have selected 'normal execution' and the warning sign has now gone. But the main problem remains the same that workflow would run upon restarting it but after leaving it to run on schedule, it display the same error which is the link leading from split to exclusion remain blinking. Does this means the data that is flowing from the split does not exist so there is no SMS or email...