"cmd (System Exec.vi)" is not a valid object name for RT target PXI8119

[philipp.frase]

Hi all,

I want to create a VI which uses the "System Exec.vi" on my RT target PXI8119 running PharLap OS to enter some command line commands. However, when I want to add the "System Exec.vi" to my block diagram, it gives me the error message describe in the title of this post.

I can create the final VI on my local PC and move it to the RT target, but then I cannot execute the VI because of following error: "SubVI 'System Exec.vi': Sub VI not supported in current target".

Does someone know, why this is not working? I read somewhere that it should be possible.

Attached are two screenshots of the problem.

Thanks in advance

Philipp

[billko]

---

@philipp.frase wrote:

Hi all,

I want to create a VI which uses the "System Exec.vi" on my RT target PXI8119 running PharLap OS to enter some command line commands. However, when I want to add the "System Exec.vi" to my block diagram, it gives me the error message describe in the title of this post.

I can create the final VI on my local PC and move it to the RT target, but then I cannot execute the VI because of following error: "SubVI 'System Exec.vi': Sub VI not supported in current target".

Does someone know, why this is not working? I read somewhere that it should be possible.

Attached are two screenshots of the problem.

Thanks in advance

Philipp

---

According to Real-Time Module on Phar Lap ETS Targets it's not supported.

[rolfk]

---

@billko wrote:

---

@philipp.frase wrote:

Hi all,

I want to create a VI which uses the "System Exec.vi" on my RT target PXI8119 running PharLap OS to enter some command line commands. However, when I want to add the "System Exec.vi" to my block diagram, it gives me the error message describe in the title of this post.

I can create the final VI on my local PC and move it to the RT target, but then I cannot execute the VI because of following error: "SubVI 'System Exec.vi': Sub VI not supported in current target".

Does someone know, why this is not working? I read somewhere that it should be possible.

Attached are two screenshots of the problem.

Thanks in advance

Philipp

---

According to Real-Time Module on Phar Lap ETS Targets it's not supported.

---

And that is because the Pharlap ETS kernel does not support the Windows API function CreateProcess(). The most likely reason is that creating processes under Windows is a very performance costly function that requires global locks to be used to guarantee memory integrity and that would mess up the real-time characteristic of the OS very badly.