LaunchExecutableEx() does not return -4 when path to exe is not found

[mdokic]

LaunchExecutableEx() is not returning an error (-4 or -3) event though path to the file does not exist on the PC I'm runing the application on. It returns 0 (as if the exe was sucessfull).

Thanks,

Mira

[Wolfgang]

It would be useful to add some more details, version of OS and CVI...;

For me, when running LaunchExecutableEx () (CVI2013SP2 and Win7 64 bit) with a non-existing file ("C:\test.exe") I receive error -19 (The operating system returned an unknown error code).

[mdokic]

I am currently using WIndows XP and Lab Windows 10.0.1

The LaunchExectuableEx returned no error even though the path or file were not existing.

[Gloorious_Leader]

Can you post a snippet of your code and explain what the intent of the code is?

[mdokic]

Hi Steve,

status = LaunchExecutableEx ( command, LE_SHOWNORMAL, &ExecHandle.crt );

I launch Java script that will perfrom certain operation and write result to a file. I'd like to be able to distinguish when the executable did not launch vs, when executable failed to perform it's operation (due to some other reasons). When the executable is in the path the LaunchExecutableEx will launch it, but when it's not there the LaunchExecutableEx still returns 0.

[Gloorious_Leader]

Do you see this behavior only in this code you wrote? Does the same thing happen when you run the launchexe example as well? (In Example Finder: Communicating with External Applications>>Operating Systems>>launchexe.cws)

When I run this example and select a non-existant file, I receive error code -3 (File was not found) as expected.

[mdokic · Accepted solution]

The example works. I thing I understand the problem. 

What I pass to the LaunchExecutable isn't just path to exe. I pass java -jar + path to exe + path to XML. All LaunchExecutableEx knows is that it launched java -jar (hence it returns 0). Path to java executable is irrelevant to LaunchExecutableEx.

I guess I'll have to do something else prior to call to LaunchExecutableEx to verify that java executable and XML are present.

[LuisG · Accepted solution]

There's a FileExists function in the Programmer's Toolbox

[mdokic]

Thanks!