Hi Jeevitha,
Even from runtime work bench when you send the message it will reach to integration engine and your ICO doen not execute in abap stack of PI system and there will be no configuration for this interface in ABAP runtime cache that is why it is failing with above error, if you want to send the message to ICO then there will be Send Test Message in NWA depending on your PI version, if you dont have use this blog to send the message to ICO HowTo - Send Test Messages to the Adapter Engine (to an Integrated Configuration , Or you can run the scenario normally means place the file in the directory.
Regards,
Praveen.