Hi,
Please first check if note "2135190 - Wrong AVC data after executing transaction FMAVCREINIT" is applied in your system.
If it is applied please read this note "1325147 - RFFMRC04: Errors in totals records that cannot be reproduced"
And later execute report RFFMRC04 first in test mode and if there is any inconsistency in update mode.
If you continue getting inconsistencies please execute transaction FMAVCDIFF to see if there is any inconsistency and later FMAVCREINIT to correct them.
Best regards,
Sofía.