Change document for BKPF-STBLG

Hi All,

I am having trouble generating a change document when the field BKPF-STBLG (Reversed Document Number) is populated via FB08.

This particular field's data element is flagged for change documents and SCDO contains several standard "BKPF type" change document objects.

This should be easy so what am I missing?

Thanks in advance,

AK