In NAV 5.0 SP1 I get this error message when I try to POST an Sales Invoice
the transaction cannot be completed because it will cause inconsistencies in the g/l entry table NAV 5.0 SP1
It only happens when I try to post an Invoice with a G/L Account (only found problem with one G/L Entry 7000000001).
When I try to post next time works ok, and posts the invoice with no errors.
I saw some threads talking about same problem, but not NAV 5.0 SP1...
I applied this fix
to see a list of GL lines Inconsistency
You can see results here