Dear Boris,
If you run F.05 with flag 'Balance sheet preparation val", the program updates the valuation difference in the open item (field BSEG-BDIFF). If you run the program again with the same
selection, the program compares the value in the valuation difference (field BSEG-BDIFF) and it is displayed in the "old difference" column. Only if the new difference is different to the old difference, the
program creates a valuation document.
If the field old difference is filled, it means that the field BSEG-BDIFF was updated from a previous run.
In this case SAPF100 posts the delta between new and old difference.
I hope I could help.
Best regards,
Erika