system exec vi launches console app but with blank screen

[GilMaor]

Hello All

I am using the system exec to launch an external application, which is a console app.

When I double click the app, it runs normally and I get the console screen with messages.

When running the app using the system exec, the console screen opens but with no messages.

Moreover, I cannot kill the app using taskkill /IM ...

When using a non console app it runs and closes correctly. 

Does anyone has an insight?

I have attached a screen shot of my code.

Thanks!

Gil,

[GilMaor]

Hello All,

I need to run a an external app using system exec VI.

When I ran a windows app all is working well, And I can start the app and then kill it.

But when I run a console app, I get a blank console screen, and cannot kill it.

I do get the output in the "standard output" window but I want this data to appear at the console.

Who has an Idea?

Thanks!

Gil,

[rolfk · Accepted solution]

Change the boolean input "wait until completion" to false.

[GilMaor · Accepted solution]

Hello Rolf first of all thanks

I have done as you suggested, 

The app does open.

But I can not close it using using "taskkill /IM"

thanks!

Gil,

[GilMaor]

Ok, I have found the problem of not being able to close the app.

The app name had a "space".

I removed the space and the app is closed.

Thanks!

[rolfk]

---

@GilMaor wrote:

Ok, I have found the problem of not being able to close the app.

The app name had a "space".

I removed the space and the app is closed.

Thanks!

---

It might have worked if you had used taskkill /IM "Vacuum Tester.exe"

[GilMaor]

Thanks!

[RTSLVU]

On a side note I have found that depending on your Windows UAC settings LabVIEW programs my not have the permissions necessary to taskkill an application even though it has the permissions to launch it.

I ran into that when I wrote a LabVIEW GUI for Iperf.

[GilMaor]

thanks,

the problem was the space in the app name.

After removing the space taskkill worked just fine