Dear all,

I'm new in using DIVA 3.0. I've just tried to run my first simulation, a basic visualization one, but it fails.

Here's the error message I get. Can anybody help me?

Thank you,

Luca

Tags: error, mistake, simulation, visualization

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Hi Luca,

Can you capture the top part of the command prompt window? The error is happening before what your screenshot shows.

Thank you,

Alstan

Sorry. Here it is.

Hi Luca,

there is an error in your materials file. My strong suspicion based on the error message is that you saw a material format from a website or manual somewhere that said materials are specified as "mod type name." This is true, but mod is not a valid parameter input. When there is no modifier, the appropriate text to use is void to indicate that there is no modifier.

So a simple 50% reflective grey surface is defined as,

void plastic grey_50

0

0

5 0.5 0.5 0.5 0 0

Best,

Alstan

Dear Alstan,

sorry for my late reply, but during these weeks I had to finish another part of my project. 

I modified the materials, but I still have some errors. I attached the screenshot of the error window. It says "bad arguments for Glazing_Single_pane_88". I modified that material as I report here below:

# Glazing_SinglePane: Tau_vis = 0.88; SHGC= 0.82 ; U-Value= 5.82W/m2K
# visual transmittance: 88%
# visual transmissivity: 96%
void glass Glazing_SinglePane_88
# 0
# 0
# 3 0.96 0.96 0.96
# void glass Vetro_Finestre
0
0
3 0.870 0.870 0.870

If you may help me again I would be very grateful. Thanks a lot,

Luca

Hi Luca,

I think you cannot have comments like you have there. You probably want your material definition to look like this,

# void glass Glazing_SinglePane_88
# 0
# 0
# 3 0.96 0.96 0.96
void glass Vetro_Finestre
0
0
3 0.870 0.870 0.870

Remember that if you edit the main DIVA materials file in C:\DIVA\Daylight\ you will need to re-run the Location command for your changes to take effect.

Best,

Alstan

I solved it. I think I put too low values in transmittance of a glass material. Is there any lowest limit?

I am not sure, but 0.870 is definitely not too low.

Yes, in fact I think there was also a mistake in a glass material with transmittance value lower than 0.1.

Thanks again,

Luca

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