Let me explain problem here :
* Zipcode field - I have created PCF Control to look for zipcodes.
* I have added subgrid to reference multiple child accounts
* In field mapping , I have setup Zip code field to auto populate based on primary account
* When I try to create child account , it does not set value in my PCF Zipcode control but if I remove my PCF control and use standard control than value is being shown .
Let me know if you have any questions.
Thanks
Anupam