Thank you for taking the time to visit the Community to post your issue, although I apologize that you haven't received a response.
We will need a bit more information to be able to assist. Please take a moment to review the information here and post back with the year and version of Quicken you are currently running.
Please include the name of the financial institution that is returning this error.
Also, are transactions being updated automatically from Quicken or is a file downloading from the bank's website?
The more information you can provide regarding this issue will help the Community to better understand and assist.