[Radiance-general] Problems with impostor surface creation

[Greg Ward]

Strange error.  Out of curiosity, what happens if you use "-t default" instead of "-t white"?  Also try giving the file as "./LLM154T5.ies" instead.

Unfortunately, the error message doesn't give much clue about where it's happening or why.  It could even be an error in the IES file.  If there's a tilt data file that's missing or contains a nul byte, that might cause it as well.  You could try e-mailing me your file off-list as an attachment.

-Greg

> From: "Chien Si Harriman" <CHarriman at gb-eng.com>
> Date: May 19, 2011 2:09:08 PM PDT
> 
> Hi all-
> 
> Thanks for all your help with the problem I'm having modeling glare from
> light fixtures.  I have a very simple problem that I can't seem to
> solve, as I'm trying to create the impostor surface.  I'm following the
> example given in Chapter 5 of the Radiance Bible.  Pg 319 describes the
> use of ies2rad.  I cannot get ies2rad to work!  I've tried everything I
> can think of...I've tried putting my IES file in my installation folder,
> I've tried copying ies2rad into a local temporary file and then copied
> my IES files into the same directory, and running ies2rad.  Everytime, I
> get an error
> 
> I'm running windows 7.  At the command prompt, I am typing:
> 
> ies2rad -t white -i .56419 LLM154T5.ies
> 
> the program always responds:
> <null> No such file or directory
> 
> I believe ies2rad is working.  If I type in ies2rad I get the following
> response:
> ies2rad: missing output file specification
> 
> 
> I know this is a basic question, but new to me.  Any help would be
> appreciated!