|After adding an item to an invoice and selecting Save Close, you may receive a run-time error 3077.
|There may be an invalid character in a POS item in this invoice, such as an apostrophe (') or a quote ("). Remove the character.
There may also be an invalid character in a package name. Check this under Tools > Unit Setup > Packages.
This can also be caused by deleting a tax class that has POS items associated with it. If this is the case, you will need to reassociate each POS item with a tax class.