Actually the jvno index tag has expression dtos(jvdate)+str(jvno) for both jvhdr and jvdtl files & the relation expression for grid also set to same.
But this should not be a problem as there are half a dozen other forms with same indexing type (voucher numbers start daily from 1).
Is there any other event which can be trigerred to refresh the relation in DE.

Rajesh