During the parsing of a scene, I get the warning:

   Parse Warning: Expected pure RGB color expression, unexpected filter and
   transmit components will have no effect.

The warning does not indicate what sort of statement caused it or where it
occurred.  My attempts to narrow the problem down have been wholy unsuccessful.

I get the warning in 3.7RC3, but not in 3.6.2.  I get the warning regardless of
whether the main .pov file sets #version 3.6 or 3.7.

The message appears during the parsing of an #include file that sets #version
3.6 and, in turn, #includes 5 other files that also set #version 3.6.  It also
#includes colors.inc and transforms.inc, both of which set #version 3.5.  All
the #include files reset the #version at the end.

My first suspicion was that I'd used a color value as an ambient, but
deliberately setting the ambient to rgb 0.1 (while skipping the #include file)
did not reproduce the warning.

I put #debug markers thoughout the #include file to try to locate the source of
the warning.  Yet, when I place additional markers to try to narrow down the
problem, or even completely comment out the section indicated by the markers,
the warning message jumps to a place totally different from where the original
markers indicated.  For this reason, I have been unable to come up with a
minimal code sample to reproduce the problem.

This may be a low priority issue, as it involves only a warning.  Still, it
would be nice to know what exactly I'm being warned about.  However unlikely, it
is possible that I'm doing something that I didn't intend.  The issue of parse
warnings not giving enough information has come up before (the "warning
postings" thread).

My OS is the infinitely exasperating Windows 7 Ultimate.

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