Question Old file with >128-character path wouldn't load in Win10 x64

Pimpom

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May 11, 2008
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Today I tried to open an old electronic PCB design file from my backup thumb drive but received the error message "Unable to find PCB file......[file path]"

The file is buried deep within many layers of sub-folders and the full path is 134 characters long. It loads without any problem when I shorten the file name to reduce the path length to 128 characters. Shouldn't the limit be 256 characters?

As a test, I saved a Word file with a long name in the same directory . The path length has 142 characters. This one loads fine in Word.

Is the difference in behaviour due to the fact that my old CAD program is 32-bit whereas MS Word is 64-bit? I didn't think that would make any difference within the same OS.