Hi mciavolino,
The error 350 shows that some of your transactions have a duplicate or damaged. To resolve it, check for the GJE #4847, GJE #, Receipt #2135, and Invoice #12553 transactions, if what's the causing the error. You'll have to manually delete or recreate those transactions.
I have here useful user-guide on how to remove duplicate transactions.
After modifying those transactions, try rebuilding your file again.
You can always reach out to me if you need more help in solving this
