How to create a aggregation field in DME file?
Follow the settings like below (Sample template: LUX_VIR2000)
Setup Sort fields: Sum by Vendor level + Value date in DME file.
1 segment contains lower level (2) data for aggregation field
Technical Field with Reference ID (N_P_VLUE)
Target field mapping is Aggregation, setup to N_PVLUE node.
Result (to test alternative payee with one payment in DME file):
Finally we have DME result: