That's an interesting point as the only light geometry that cause a problem (pointLite.obj) is 9 characters, whereas the other 3 that don't (areaLite.obj, infLite.obj, and spotLite.obj) are 8 or less.

However, Head.obj is only 4 characters and the same problem occurs with that too.

So I don't think that's the problem - at least not for Head.obj. Although it could be the problem for pointLite.obj I think it more likely that an an explanation that applies to both pointLite.obkj and Head.obj will be the answer

P.S. I recall having to use eight character filenames (usually 6 characters followed by ~1, or ~2, etc) when using the DOS cd (change directory) command, and having to use  dir /x (print directory, displaying 'the short names generated for non-8dot3 files') to find out what 9+ character directory names had been truncated to. I just checked and it's still the case if you run cd from a command prompt in Windows 10. dir /? gives the explanation of the /x option. So, for example, a file/directory called 'My Poser Stuff' would be truncated to 'MYPOSE~1'

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The 3Dcheapskate* occasionally posts sensible stuff. Usually by accident.
And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU.

*also available in ShareCG, DAZ, and HiveWire3D flavours (the DeviantArt and CGBytes flavour have been discontinued).