Knowledge Management

Question:
When i create the sales order and save it for some reason the value of VBAK-NETWR becomes negative in the sales order. I doubt that it is some user exit which is triggered when i save the sales order. I checked and there is code in both the user exits-save document and save document prepare. I dont know which one is triggered and is there any other user exit which will make the value negative.
PLEASE HELP
Answer:
Put a break point and check in
userexit_save_document_pre pare and USEREXIT_SAVE_DOCUMENT vbak and vbap table field NETWR
its the problem in user exit only ....
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SridharS