BAM header errror: bad magic number

Dinesh Gandhe

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Oct 10, 2025, 8:41:26 AMOct 10

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BAM header errror: bad magic number. This could be caused by either a corrupt or missing file. Screenshot 2025-10-10 181026.png

igv-help

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Oct 10, 2025, 10:18:36 AMOct 10

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Did you have a question?

Yiping Zhan

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Oct 21, 2025, 9:34:34 AMOct 21

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I have the same issue. When I use a much older version of IGV web app (1.7.0) things work with exactly the same session file. However, with a recent version (2.3.4) I see the error shown below. Does anyone know what is going on?

Thanks,

Yiping

Yiping Zhan

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Oct 21, 2025, 12:16:13 PMOct 21

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After drilling down fixes mentioned in this thread https://groups.google.com/g/igv-help/c/JjYQqziEhx4/m/EPaciXY3BAAJ and clearing my browser cache the error message went away.

Thanks,

Yiping

igv-help

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Oct 23, 2025, 11:28:20 AMOct 23

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Glad to hear it's working for you now. Thanks for letting us know.

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