Enhance infotype-shows warning message if data enterd exists

Question: Hi all.

Do you guys know where to enhance an infotype?
I created an infotype and I want it to behave in a way that if the data in a particular field already exists, it will show a warning message (ie just like in IT Communication - If the number already exists in an existing employee- it shows a warning message to whom the number already exists)

Thanks in advance.

Answer:
It sounds to me that this requirement needs a user exit. There are different types of user exits and the topic is covered in many different postings in this forum.

Do a quick search and you will get the information you need.

Kind regards,

Evan
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SAP HR & BW Consultancy

Answer:
You could do this with a user exit, but if you are working on an infotype you created, you can insert code anywhere you want. have a look at your code in your module pool. MPXXXX00 where XXXX = your infotype.
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Gr,
B.
SAP Function Module Documentation Repository!

Answer:
Thanks
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