Many examples of altering and filtering messages can be found in the userror_enduser.xsl transformation sheet. The basic procedure to follow is:
"internal error (code). Contact your system administrator"
A subset of about 100 messages in the "Frequent End Users Msg" category has been selected to be suitable for end users.
All other messages are considered 'technical'. The userror_enduser.xsl replaces these messages with the standard message above.
Some messages are also completely filtered in this xsl transformation, this to avoid multiple internal error messages presented to the end user. In this case, no message box is displayed.