I am currently testing a macro by jr.: tabulated.inc. In one of his demo 
scenes he uses the following line:

#declare seed_ = val(datetime(now,"%s"));

Using Windows10, and POV-Ray v3.8.0-beta 1, I get the following error:

Parse Error: Invalid formatting code in format string, or resulting 
string too long.

I contacted jr. about this and he answered the following:

"POV-Ray's documentation says the "..optional STRING parameter should
conform to the same formatting as that of the strftime() C function."
and (lowercase) "%s" is documented as described and used.  I assume
that the Windows 'strftime()' does not provide that option?  else it
would be a POV-Ray on Windows bug, I guess."

I mention this error also on behalf of jr. I am not sure about which 
system jr. uses, obviously not Windows, but he will jump in if you need 
to know.

-- 
Thomas

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