Hi Patricia,
Currency revaluations only affect Home currency equivalent amounts, not the Source currency. When you are printing the AP report to determine the balance as of July 31, are you printing just the Source currency list (which would be incorrect) or one that lists the Home currency equivalent (which should balance the GL).
To fix, you will need to determine whether AP or GL has the correct balance, and where the incorrect information is. It may be that the revaluation was posted to the August period in GL. I can't advise the specific way to proceed without more detailed information.
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Regards,
Softrak Tech Support