Ah, 2.41 has a Windows executable (rather old: it's from 2009...)
2.42 (from 2013) does not have one.
> The error message is (in place of the graphic). When I use it from a
> command line I get the file created and can view it OK, just not in wikidPad
>
> [Ploticus error: usage: pl scriptfile [options] ...or... pl -prefab
> prefabname [options]
> ploticus 2.41-Mar2009 (win32). This build can produce: PS EPS SVG GIF
> Copyright 1998-2008 Steve Grubb,
http://ploticus.sourceforge.net
>
> 'DIdeas' is not recognized as an internal or external command,
> operable program or batch file.
> ]
I have no idea where this "DIdeas" is coming from exactly.
You might want to edit the plugin to get a better error message
(by printing the used commandline):
In file "extensions/PloticusClBridge.py"
change line 151 so that it reads (one line):
return u'<pre>' + _(u'[Ploticus error: %s]\ncmdline: %s') %
(errResponse, cmdline) + \
Then restart WikidPad and try again.
Hopefully the commandline added to the error message will help to find
out more.
BTW: Ploticus seems to be a more or less stopped project.
From the website:
> Dec 2016: A new compact python API called SVGdatashapes supercedes
> ploticus; For details please see
http://svgdatashapes.com
Perhaps it's worth to check that new one too.