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If the client wants to try the export again they need to un-export the batch and then un-export the AR invoices (using utilities), and then either give the invoice in Workbench a new unused number, or delete the invoice with that number from MYOB.
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Errors:
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“BusinessLine_AccountHeaderNotAllowed”
Solution:
This means that the invoice lines have been coded with ‘header’ GL codes (i.e. it has children GL Codes). Only non-header GL Codes should be used (see highlighted below). header accounts such as 6-0000 and 6-1000 are just virtual GL codes that group together actual GL Codes, so they can't be used on transactions
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