System.AccesswiolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. at OLE_Center QBONU32/QBOLBCenter_ExecuteCmd/String strOmd, stuMILa: data) at OLB_Center.ProwQBO LB.ExecuteQECommand/St

Welcome to the Community space, @njabaters.

Allow me to share some insights as to why you are having some issues whenever you press bank feeds to download transactions in QuickBooks Desktop (QBDT).

Learn how to resolve "System.Argument.Exception" and "System.TypeInitializationException" errors in QuickBooks Desktop Bank Feeds Center.

System.Argument.Exception
 

• System.Argument.Exception: The parameter is not valid.
• at System.Drawing.Image.FromStream(Stream stream, Boolean useEmbeddedColorManagement, Boolean validateImageData)at System.Drawing.Image.fromStream(Stream stream)at System.Windows.Forms.PictureBox.Load()at System.Windows.Forms.PcitureBox.set_ImageLocation(String value)at OLB_ Workflow.UICtrl_OLBWorkflow.SetILogo(String strFILogoPath)
• System.ArgumentOutOfRange.Exception: The index was out of range.

System.Argument.Exception errors are caused mainly by:

• Special characters in a vendor name.
• Damaged payee, vendor, or renaming rule.

To continue working on your bank transaction, follow these steps:

For more detailed steps, you can view this article:

Fix System Exception errors.

Moreover, you can also check this article to help you with your future work:
 

• Reconcile an account in QuickBooks Desktop
• Add and match Bank Feed transactions in QuickBooks Desktop

Please come back to this post if you have other concerns or follow-up questions concerning issues in downloading your transactions. I'm always here to help.

All these solutions have been attempted and the error persists.

I appreciate you for performing the troubleshooting details mentioned above and for coming back to the thread, njabaters. I'll ensure you'll be routed to the right person to assist you further so you can download transactions smoothly.

Since the issue persists, I recommend contacting our QuickBooks Desktop Support Team. They have the tools to pull up your account and be able to investigate the cause of the error and why it keeps happening.

Here's how:

1. Press F1 to open the Help window.
2. From the search icon, type Contact Support.
3. Click Contact us at the bottom part.
4. Give a brief description of your issue about downloading transactions and click the Search button.
5. You'll be routed through How to connect with a QuickBooks expert and you choose which one is best for you.

Lastly, you can read this article if you need steps on how you can review and match transactions in QBDT to avoid duplicate data: Add and match Bank Feed transactions in QuickBooks Desktop.

Let me know in the comments below whenever you need additional assistance with managing bank entries in QBDT. I'm always around to continue helping you, njabaters. Stay safe!