Hi Pere Cordonet:
I confirm that the change you made to hbjson.c corrects the error-- so that the return is the character string "20210401" Good detective work !
However, I have no idea *why* it works ?? !!
Because in this particular section of the code, the Harbour version is identical to the original code in xHarbour. !
I don't understand how the (pValue) can be both NUMERIC *and* DATE at the same time.
What is happening here ???