I can't remember if I tried that or not, but let's give it another shot, just in case
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It's a 2004 SW part file renamed as a txt file and zipped, so unzip and rename the file extension to " .SLDPRT " and we'll see if it works.
Dean
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Didn't work, when you try to unzip it, same thing happens, says it's corrupted..... It's too large a file to upload without zipping.