Hi Sunitha,
HTTP status 200 means the message processed successfully, but the response not received from the receiver system.
Any error log in RWB or moni?
Please check your configurations once. Did you activated all the objects in ESR and ID?
Try to test the configuration using test configuration from ID.
check whether you are receiving response from the receiver system or not?
If yes check if it is reached to PI?
Below links may helpful to resolve the issue
HTTP Status Code 200 Received But Error During Response Parsing
HTTP 200 error: Error Parsing Response. No XI Response Received
Regards
Bhargava Krishna