Missing Cookie Unsupported Pyinstaller Version Or Not A Pyinstaller Archive Top Instant

The two executables likely used different PyInstaller versions or different build options (--onefile vs --onedir).

To understand the error, you first need to know how PyInstaller packages Python scripts into standalone executables. Then attempt to parse TOC (table of contents)

def find_pyinstaller_cookie(data):
    # Look for cookie signature near end of file
    # PyInstaller cookie format: 8 bytes magic (MEI\0\0\0\0 or similar)
    # plus version and struct length
    cookie_magic = b'MEI\0\0\0\0'  # older versions
    alternatives = [b'MEI', b'PYZ', b'\x33\x0F']  # heuristics
for offset in range(len(data) - 100, max(0, len(data) - 5000), -4):
    if data[offset:offset+4] in alternatives:
        return offset
return None

Then attempt to parse TOC (table of contents) even if version mismatch, by brute-force scanning for PYZ entry points. len(data) - 5000)

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