Upgrade from 11.5.10.2 To r12.2.4 and Inventory to GL is not matching

Cost Accounts are not posting to GL at Period close.

We have a critical issue in our month end close just begun where Cost Accounts posting detail in the European inventory org did not interface to the General LEdger.

I ran a Trial Balance report in the GL and get a balance in account:

02-200-604000-000-00000-0000-0000 of 457,398.69

in Material Distribution Form, I exported the month's detail and see a net balance of : 732,147.59

so the difference is substantial. This is the first month we have closed in our 11.5.10 upgraded to 12.2.4 and either did not discover this issue during our test close or it did not occur, not certain.