# Is there a "Troubleshooting Guide" regarding warnings and errors?

**URL:** https://forum.duplicati.com/t/is-there-a-troubleshooting-guide-regarding-warnings-and-errors/20788
**Category:** Support
**Created:** [June 20, 2025, 9:46am UTC](https://forum.duplicati.com/t/is-there-a-troubleshooting-guide-regarding-warnings-and-errors/20788 "2025-06-20T09:46:44Z")
**Posts on this page:** 1
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### Author: ![Kasey\_Chang](https://forum.duplicati.com/user_avatar/forum.duplicati.com/kasey_chang/32/11355_2.png) [@Kasey\_Chang](https://forum.duplicati.com/u/Kasey_Chang)
#### Post date: [June 20, 2025, 4:40pm UTC](https://forum.duplicati.com/t/is-there-a-troubleshooting-guide-regarding-warnings-and-errors/20788/3 "2025-06-20T16:40:56Z")

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Okay, right now, the backup has finished, with 27 warnings and 68 errors:

The warnings are of 2 types:

a) Missing remote hash, one of the files is listed as verified with size, but is the wrong size

b) FileAccess Error – this one I can deal with… I exclude this subdir from the backup

The Errors, however, I have no idea how to get rid of:

FailedToProcessFile: Failed to process file duplicati-iXXX.dindex.zip.aes CryptographicException: Invalid header value: 00-00-00-00-00

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