Creating Purchase Order from Sales Order via DI

Hi

I get the dreaded -5002 Error when trying to create a Purchase Order referencing a Sales Order.

The variables BaseEntry,BaseLibne contain valid values i've doublechecked that.

is it not possible to generate a referenced Purchase Order this way? If not is it planned?

I use the approach:

oPRDR.CardCode=CardCode

oPRDR.Lines.BaseType = 17

oPRDR.Lines.BaseEntry = BaseEntry

oPRDR.Lines.BaseLine = BaseLine

retval = oPRDR.Add()

btw. I'v tried it without:

oPRDR.CardCode=CardCode

but didn't work either.

tia