The server detects a protocol error on the specified session because a verb has been received that does not adhere to the client-server exchange sequence.
The server ends the client session.
If the client generating the error is not an API client, contact your service representative. If the client generating the error is an API client, contact the owner of the API client. If the client generating the error is a client that you have created using WDSF verbs, correct the programming error in your client program.