[GNC] Post invoice still wants to be paid

[David Cousens]

> David,

I honestly don't know how an unposted invoice appears in the XML file.
By default, the XML file is stored in a gzipped state. If you edit the
preferences in the General tab there is a checkbox for Compress files.
Unselect that and File->Save or -> SaveAs to get the uncompressed
version.  I have opened an uncompressed version of a test file I use
for investigating how GnuCash functions.

If you search for the tag  <gnc:GncInvoice version="2.0.0"> you can
locate the invoice records between that and the </gnc:GncInvoice> tag. 
If it is posted there will be a tag 
<invoice:posted>
    <ts:date>2018-07-20 00:00:00 +1000</ts:date>
  </invoice:posted>
within that structure.  

There does not appear to be a link from this record to a payment - that
is possibly elsewhere in the file . The invoice does contain  links to
the guid for the post transaction which may allow you to identify the
payment transaction.
It may not simply be a matter of changing that entry however to post
and unpost an invoice as that action may also affect records elsewhere
in the structure of the book. If you do attempt to edit it, keep an
original copy you can restore.

I would only use this to identify the invoice numbers, tag
<invoice:id>000003</invoice:id>, for any invoices you think are a
problem in the XML file and then use the Business->Customer->Find
Invoice  dialog to pull them up and make any modifications within
GnuCash.  If the payment has become separated , it is possibly easiest
to delete the payment transaction and then unpost the invoice, repost
it and enter the payment details using the Process Payment entry to
assign the payment to the specific invoice. One of the main developers
may be able to provided more help.

Hope this helps

David Cousens