Problem with error message

Hi Experts,

Im populating an error message in the standard transaction (VA03) to restrict the user from viewing the print preview of the document. The error message works perfectly well in the initial screen of the transaction. But when the same functionality is performed after entering into the document, its getting converted to an Abort message. Using the other message types as I,W,.. does not serve my purpose.

Is it anything to do with the screen number? What could be done to change the message type?