The simple, if ugly solution is to open up your Edit->Preferences dialog, select the Converters pane, select the LyX preview -> PPM converter and change its definition to
python <full path to>/lyxpreview2ppm.py
Also need to install an up to date version of Python and ensure the folder holing python.exe is in your system PATH. Then rename the currently shipped version of python.exe in lyx/bin
Preview then works fine.
But moving on---
I cannot now view .pdf images in 1.3.5 under windoze I'm seeing a convertDefault.sh Error The script cannot find the ppm file in the temp dir
any ideas?
Rob S
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R D Saunders Hydraulic Research Group Department of Civil and Environmental Engineering University of Southampton UK