IMAQ usb Camera black screen in exe file

[MelliCain]

Hello, 

USB Camera works in vi file. In the exe file but the screen is black. I tried other solutions posted in the forum. There are those who wrote that it was fixed when repaired. I tried again it didn't work. Then I completely uninstalled labview. I reinstalled. It still didn't work. How can I find a solution?

Thanks for help 

[GerdW]

Hi Melli,

do you get any errors in your executable from IMAQ?

When the image display stays black then there should be an error…

AFAIK you need runtime licenses to use IMAQ/Vision functions in executables: can this be an error source in your case? (I'm not sure about that as I don't work with IMAQ.)

[MelliCain]

There is no errors. Just black screen. 
I checked licenses. It is okey. 

I tried it when I took labview lesson. I saw it working. But now I'm stuck in my undergraduate project.

[GerdW]

Hi Melli,

do you even check for errors in your executable? Is there some error logging in your program implemented?

(One more idea: Did you verify the correct camera references is used in the executable?)

[MelliCain]

Hi, GerdW

I put error box. There was not error. The interesting thing is the camera works in vi.

I think it's a firewall issue. Do you think this could be the problem? If it is firewall problem, how can I solve?

[GerdW]

Hi Melli,

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@MelliCain wrote:

I think it's a firewall issue. Do you think this could be the problem? If it is firewall problem, how can I solve?

---

Maybe a firewall interferes network communication of your executable…

To solve that you need to check the firewall settings/parameters/rules!

[MelliCain]

I checked the firewall. Exe file is allowed. I did it once. There was no problem. Why is this happening? How can I find a problem? 

[GerdW]

Hi Melli,

---

@MelliCain wrote:

How can I find a problem? 

---

Then you need to debug your code.

As you did not provide any attachments so far you need to do that on your own!

When the executable only "shows a black image" then I see two options:

• there is an error when IMAQ is called, resulting in a black IMAQ indicator
• there is no error when calling the IMAQ functions: in this case the camera actually delivers "just a black" image. (Does your executable set any camera properties in a weird way?)

In the end it sums up to "Debug your code"…

[Niatross]

I have had this problem before. The quick fix was to manually install the vision runtime engine. There is a kowledgebase for this but I can't find it now.

https://www.ni.com/en-gb/support/downloads/software-products/download.vision-development-module-runt... 

[drjdpowell · Accepted solution]

In the EXE build settings, there is check box called "Allow future versions of the LabVIEW Runtime to run this application".  Try turning that off.