Consolidation is done for several companies with different currency.
During the process, all intercompany accounts must be eliminated. But the actual elimination rules process is not optimal.

Elimination transactions are retrieved with original company currency. Elimination journal is balanced in different currency but not on consolidation company currency. Then journal cannot be posted.

Workaround
Run Elimination rules to identify exchange rate adjustment

Workaround A
* After each elimination, modify Elimination rules and add line for elimination rules for fixed amount with exchange rate adjustment
* Run new elimination rules
* Journal should then be balanced

Workaround B
you can also add in General ledger parameters penny differences for the exchange rate difference value (to be changed after each elimination)