How to run .exe file with various input files and one output file in MATLAB

I have an abc.exe file which uses 3 input text files say p.txt q.txt and r.txt and generate z.txt as an output file.

This is working fine in Linux but how to do it in MATLAB. I ran it with system command as:

status = system('abc.exe p.txt q.txt r.txt z.txt') and

status = system('abc.exe ' 'p.txt ' 'q.txt ' 'r.txt ' 'z.txt')

In both cases, it does not generate z.txt and value of status is not zero.

How to rectify this ?

[dpb]

Return the optional message for further info on why it failed.

Likely guesses are that the path isn't set in the spawned session so the executable and/or the data files aren't found.