On 64-bit systems, array.array('L', ...) expects the buffer to be 64-bit aligned, so OleFileIO_PL doesn't work there.
The fix is to change all calls like array.array('L', ...) to array.array('I', ...).
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<foo>
[foo]
More information about formatting options
array.array should use 'I' for 64-bit compatibility
On 64-bit systems, array.array('L', ...) expects the buffer to be 64-bit aligned, so OleFileIO_PL doesn't work there.
The fix is to change all calls like array.array('L', ...) to array.array('I', ...).