Hi Lannie,
Thank you so much for your post and welcome to the Community Forum! Sorry to hear that you were not able not able to import and thanks for the information. When you receive this Error from a failed import it usually means there was no corresponding account code in the accounts list. Check that there definitely is an expense account using that account code in the accounts list if you haven't already. And also, can you please try to save the file in Notepad then try to import it in MYOB?
Please do let me know how you go on this.
Regards,
Earl