OnError event executing multiple times for one error

I have a ssis package that includes a foreach loop. The foreach loop cycles through the instances that are provided from a specific table. Once the loop hits an instance that cannot be contacted then the Onerror event should populate a results table once. For some reason the Onerror event is populating the table multiple times for this instance instead of just once. Can someone help me with this? I tried changing properties of DelayValidation and that did not help