We used IDOC type - MATMAS03, Message Type - MATMAS to create/update Materials for legacy to SAP conversion until we went live. We followed the standard BPDM design and generated the SAP Material Numbers externally and passed it to the IDOC for the same regardless of whether the number range set in SAP was Internal/External.
However, post go live, we still have some Delta load requests to create Materials. And, before we got these requests, a lot of Materials were manually created as well. We are looking at re-using our conversion program to handle these requests however we have a manual intervention to identify the last number used in SAP and manually calculate the next number to prepare input data for the IDOC load.
What is the best way to avoid this manual intervention and automate the process of creating Materials post go live by letting SAP determine the next number and we not having to pass it externally? Is there an existing IDOC that can be used for the same? We would like to have minimal development effort to take care of this.
Please advise. Thank you!