Calling VI script from MATLAB

I wanted to run a VI script from MATLAB, and I looked up the Internet how to do so. I learned that if I used the following commands, I could run a VI.

e=actxserver('LabVIEW.Application');
vipath='c:\Documents\Labview files\test.vi';
vi=invoke(e,'GetVIReference',vipath);
vi.Run

But this gives me an error.

Error using
COM.LabVIEW_Application/GetVIReference
Invoke Error, Dispatch Exception:
Source: LabVIEW
Description: LabVIEW:  Open VI Reference no
longer matches VIs in memory by filename. A
filename is no longer sufficient because the
full name of a VI now includes any owning
libraries.

Error in readColorVI (line 7)
vi=invoke(e,'GetVIReference',vipath);

Does anyone have an idea what should I include apart from the file path to get the script running?

Thanks