TPM2 only reverses in the user defined valuation area, not in 001

Hi,

When executing transaction TPM2 to reverse a valuation of a forward contract, I encounter the problem that SAP reverses the valuation only for one valuation area.  For reversal of valuation area '001", an error message is displayed saying 'document xxxx already contains cleared items - reversal not possible'.  When executing TMP2 with 'test run' flagged, no error message is displayed.

Does anybody know what the cause might be?

Thanks for any help provided.

Frank