Supress error message in reports 6i

Question

I am brand new to reports.
I validate a date parameter in the AFTerFormParmater. If the
date is null (blanked out) I want to issue an srw error message
and reset the date on the form to a default.
I get the my srw error message but
then I also get a system error message about the "trigger failed"
how can I supress this message
in addition - how can I reset the date so it is not blank when
the parameter form is redisplayed.
I cannot run the report from a normal form as I have not taken'
the forms class yet. Everything needs to be done from reports
itself.

Answer 1

Hi Dhananjaya,
also check this.
Messages allow you to communicate with users from your programs. They are mainly used when the user has made an invalid entry on a screen.
To send messages from a program, you must link it to a message class. Each message class has an ID, and usually contains a whole set of message. Each message has a single line of text, and may contain placeholders for variables.
All messages are stored in table T100. You create and edit them using Transaction SE91. Once you have created a message, you can use it in the MESSAGE statement in a program.
Also,
In SE91, you can see all the error message details.
For information, if the error message shows "V10222", you have enter the first three digits in "Message Class" and last three in "Number". This means, whatever the message number is, the last three digits has to be entered in "Number" and the value precedes this last three numeric value has to be entered in Message Class.
And finally,
Let me put it this way..
Every Error Message belongs to a Message Class.
So, a particular Message Class will have a number of Messages under it.
You need to know the Message class first. For Sales we have the following message classes V1, V10, V2, V4, V5, VD, VU, VV, VX, WVA
*If you want to know all the message classes available for a transaction:-*
For knowing all the Message Classes for a particular transaction, you goto-->SE93, put the transaction code and choose display. After this, there is a button on the top (Display Object List), press that button. On the left hand side you will get the Object Name-(example: VA in case of sales). Drop down there and choose Message Classes. You will get all the message classes there.
If you know the Message Class and want to see the Messages under it:
So, goto-->SE91, put the message class and choose Display
cheers,
Hema.