AO90 - Capital. difference/Non-operatng expense accounting

Hello friends.

We executed ASKB, and hit the error AAPO518 <Tolerance exceeded for differences due to currency translation >.

In AO90, I put the "Capital. difference/Non-operatng expense accounting" at the Balance Sheet Accounts Folder and it works. After this, there is no more error message and ASKBN run OK. But the accounting release are being questioned...

PS: I have the same account in "Acquis. and production costs" and "Contra account: Acquisition value" . I have seen another post and this is a probably cause to message AAPO518.

The question is: When this ledger account is required? What means this accounting field (Capital. difference/Non-operatng expense accounting)? How it works?

Thanks in advance for some explanation.

Best RGDS,

GLIPPMANN