oK I understand but there is a field call items status(0FI_DOCSTAT) in gl_14
This you can use as open item indicator when you write this field to a DSO filter the DTP by this.
And posting key can be another indicator to identify customer items.
Does this makes sense?
I dont think I have used XOPVW sorry!
http://help.sap.com/saphelp_46c/helpdata/en/01/a9b8af455711d182b40000e829fbfe/content.htm
Pls consult your functional team for this.
I dont think this field will help its functionality is diff.
Cheers!