I am getting this error on many FLAC files. But both Tag&Rename and VLC can edit the tags, and their saving the tag then makes the tag editable in Mp3tag. Mp3tag should be as tolerant of whatever this error is as the other programs.

Thanks for the example file. It's a corrupted file in the sense that the first PICTURE block appears in front of the STREAMINFO block as block #0. The FLAC Format specification states, that STREAMINFO: This block has information about the whole stream, like sample rate, number of channels, total …

Can you provide an example file so that I can investigate this issue?

Well, as noted, other packages are able to handle this. Poikosoft's Easy CD-DA Extractor was creating these bad files for years. And not fixing it, means more posts here about this. I can fix with Tag&Rename, but how to find them? Can I write a filter? Or, for my own header searching, what string i…

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File xxx cannot be opened for writing

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ryerman August 13, 2021, 9:51pm 5

Try a user-defined tool, like this:
Path: C:\Windows\System32\cmd.exe
Parameter: /c echo "%_path%" | clip

Can I find how compressed a FLAC file is?