Problem Overview
Error 9999 occurs when QuickBooks cannot connect to your bank due to a script error, server timeout, connection blockage, or faulty response from the banking institution.
Common Symptoms
- Bank connection repeatedly fails
- Error 9999 appears while updating accounts
- QuickBooks freezes or becomes unresponsive
- Bank website loads but transactions fail
Possible Causes
- Bank server outage or maintenance
- Script error from bank’s backend
- Corrupted cache or browser data
- Firewall or antivirus blocking the connection
- QuickBooks script timeout issue
How to Fix Error 9999
1. Refresh the Bank Connection
Go to Banking → Update. This can fix temporary script or server issues.
2. Clear Browser Cache (For QBO)
Cached files often trigger script errors. Clearing them resolves the issue.
3. Disable Antivirus/Firewall Temporarily
Security tools may block the banking connection. Disable them briefly and retry.
4. Contact Your Bank
Note: This error frequently occurs due to temporary bank-side issues.
If the bank confirms a server outage, wait for it to resolve.
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