Error code 100206

Alright. First of all I find it strange that we have to create a forum post to know what does the given error code mean. The only close thing I found was this thread :

This doesn’t have my error code. Is it that hard to have ALL error codes at one place and not give them one by one when someone asks?

So what does error code 100206 mean (“Backup process failed with error code 100206”), and how to resolve this?

Thanks …

It means file name or extension is too long.