I have followed this forum post which led me to the knowledge base article.
https://community.reckon.com/reckon/topics/transaction_cancelled_error_message_in_reckon_accounts_ho...http://kb.reckon.com.au/issue_view.asp?ID=4795I have uninstalled and reinstalled this program 4 times. The application works fine for a few months, and then you are unable to post transactions and get the error. Then repeat the process: uninstall, reinstall, 3 months, repeat.
Seems to be an issue 2013 version as well. Hope a patch or service pack can fix the problem, instead of having to repeat this all the time.
Thanks.