exe not being called

[baby_vb]

Hi all,

 

I'm trying to call an executable from my VB application, like this:

 

psi.FileName = "program.exe"

psi.Arguments = sArgs 'sArgs is a string from a text box

psi.WorkingDirectory= "C:\MATLAB6p\bin\newwork\Optimize_subs"

p = Process.Start(psi)

 

 

except when I call it, I get this error:

 

An unhandled exception of type 'System.NullReferenceException' occurred in Project1.exe

 

Additional information: Object reference not set to an instance of an object.

 

 

and the debugger points to the line where the file name is declared.

 

Is this a program in the executable with the way it's receiving the parameter string, or is the executable not getting called at all, I was thinking maybe a problem with the working directory (yes, the exe is in the right folder). Does anyone know?

 

Thanks! :)

[rifter1818]

Did you forget to create a new instance?

 

psi = new process()

at least i think your using processes and i dont know if there are any arguments needed for the new call,.. but thats the usual fix for that error in my experiance

[baby_vb]

Ok I'll try it

[baby_vb]

Oh my goodness. Yes it was that. I forgot to instantiate. *blush*

 

Thank you very much.