Hi ,
while doing the transportation fallow the below steps in ECC side.
1. collect the CMOD code as single request.
2. collect the append structure and extract structure. in append structure have z fields.
3. data source collection.
first import the dev system then check in QAS finally check with the PRD system.
please find the below blog how to do transport the ECC side.
ECC Data sources Transportation
Thanks,
Phani.