I've done something very similar what you are trying to do at a previous client and have not experienced this problem. What version are you using? It seems to me from looking at the source code that you should be able to add records using table T_DTAMUSADD which has a structure of DTAMUSADD. It looks like you would need to set I_MAX_ADD to be the number of records being added as well but I currently do not have access to a box where I can run a test on it. It has been a while since I have used these exits but I remember them being very flexible. There are 5 of them so make sure you are using the correct one for what you are trying to accomplish. This can be seen through debugging.
Dig Deeper on SAP HCM
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.