"The handle is invalid" when running an exe

I would like to run an executable from the Matlab command line. However when I try

system('MyProgram.exe')

I get the error,

Unhandled Exception: System.IO.IOException: The handle is invalid. 

When MyProgram.exe is run from the Windows command line, it opens a GUI that you enter commands into.

Any suggestions on what is going wrong here?

Answer 1

[KAE]

Passing along the solution from here in case it helps someone: Due to the popup window that the exe generates, I needed to add an & at the end,

system('MyProgram.exe &')

Then it works fine!