When I use 'Cancel' button, the error message does'nt desappear.
log :
SOAPFault received from Integration Server. ErrorCode/Category: XIServer/ATTRIBUTE_INITIAL; Params: Manifest cid:pi_version.PNG; AdditionalText: null; ApplicationFaultMessage: null; ErrorStack: Attribute Manifest cid:ATTACHMENT.PNG is initial.
Transmitting the message to endpoint http://sap/xi/engine?type=entry using connection SOAP_http://sap.com/xi/XI/System failed, due to: com.sap.engine.interfaces.messaging.api.exception.MessagingException: Received HTTP response code 500 : Error during conversion of XI message.