MMPUR_MESSAGE_FORCED - problem when used within a User Exit.

Hello Experts,

I wanted to raise a warning message when the tax code is changed while creating a PO.

So i have used mmpur_message_forced 'W' 'ME' '303' 'Do not change Tax code' '' '' ''.

I am getting this as a warning message but when i try to save the document i am getting another information message saying SYSTEM MESSAGE ISSUED with three push buttons, SAVE , EDIT , CANCEL.

How do i get rid of this.

Should'nt i be using the MMPUR inside an user exit?.

The same message is getting displayed as an error message while creating a shipment cost document which inturns triggers a PO!!!

regards,

Kevin.