Settings for system message type in MM

Question

Hi,
   In spro--> Define Attributes of System Messages, there are many message types are there.
If we see from the dropdown, many are not showing in the main screen but they still work in background when while doing transaction if some input is wrong.
for example in purchasing, application area 06, message type 131- RFQ for vendor & already entered, is not appearing in the screen. but when we are created RFQ twice for the same message system throws error.
Likewise many messages are there, even we donot maintain still they pop up.
how we know which message we require to maintain in the screen and which not.
like what example I have given works autonatically for transaction.
I think there may be some messages where user doesnot have control at all, what ever way you set is either W or E, system determines how it is defined in programs.
I table T100 more than 600 messages are there,
can somebody guide me on approach to work with messages. It is quite confusing.
regards

Answer 1

Hi Pallavi,
Actually some of the Messages are self explanatory in the application of the Programs.
These W/E Messages are included in the basic programs of the Transactions which runs in background to execute the transactions, if a user makes any wrong entries which afffect the proper execution of the program the system will throw these messages which means  some data is not flowing properly.
Go to SE91 and enter the Message class/Application area and you will find all the Message number related to that Application.
At the end you will find one check box called self explanatory some of them will not displayed in the drop down list at Define attributes of system messages in IMG settings.
So means you don't have the option to change these messages as per your requirement like Warning or Error messages.
Hope you understand.
rgds
Chidanand