Problems with impostor surface creation

radiance-general
1

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!

2

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" <[email protected]>
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!

3

No joy on this. I also tried the other recommendation by McMinn to
include -o as well. I wonder if there is something different about my
installation?

Chien Si Harriman LEED AP

Senior Building Performance Engineer

(P) 415.655.4005

GUTTMANN & BLAEVOET Consulting Engineers

San Francisco | Sacramento | Santa Rosa <http://gb-eng.com/page/Contact&gt;

Walnut Creek <http://gb-eng.com/page/Contact&gt; | Website

<http://www.gb-eng.com/&gt;

Certified Green Business <http://www.greenbiz.ca.gov/AboutUs.html&gt;
committed to the 2030 Challenge <http://www.2030challenge.com/&gt;

HVAC, Plumbing, Fire Protection, Electrical, Lighting,
Telecom/Technology <http://gb-eng.com/page/services&gt;

New and Existing Building Commissioning, Energy & Building Performance
Modeling <http://gb-eng.com/page/services&gt;

4

Have you tried a different IES file to rule out problems with the file
itself?

Regards,
Thomas

···

On Tue, May 24, 2011 at 1:38 AM, Chien Si Harriman <[email protected]>wrote:

No joy on this. I also tried the other recommendation by McMinn to include
-o as well. I wonder if there is something different about my installation?

5

Hi Chien,

I think you are correct, and there is something wrong with your installation. I can convert your IES file with any set of options and no complaints. Perhaps you have a file or folder permissions problem. What machine are you running on and how was Radiance installed on it?

-Greg

···

From: "Chien Si Harriman" <[email protected]>
Date: May 23, 2011 11:38:10 PM PDT

No joy on this. I also tried the other recommendation by McMinn to include -o as well. I wonder if there is something different about my installation?

6

Chien, which Radiance build did you install? Was it one of the ones at bozzograo?

Randolph

···

On 2011-05-19 14:09:08 -0700, Chien Si Harriman said:

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!

7

Also, what is the current drive and what directory is "cmd" in? What drive letter shows in the prompt? What do you see if you type "cd" at the command line and hit return?

Randolph

···

On 2011-05-19 14:09:08 -0700, Chien Si Harriman said:

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!

--
Randolph M. Fritz • [email protected]
Environmental Energy Technologies Division • Lawrence Berkeley Labs