That'd be it - I'm using Poser 6 on Win7, so an early Python. The code you linked to fixes it, thanks.

I'd assumed I was using Python 2.6 since I've got it installed separately (E:/Python26). Hadn't realised that Poser was using a different Python (just spotted it at E:/e frontier/Poser 6/Runtime/Python)

And I originally had "Poser6:" at the start of the subject line, but forgot it when I retyped after the power cut - apologies for the oversight.

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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).