using templates in saveppt2

Is anyone familiar with saveppt2?

This program saves Matlab figures to powerpoint slides, and I have used it successfully to do this. However, I can't seem to get it to use my template. I am using Matlab 2012b, Windows 7.

I have created a template which exists in the standard ppt templates location, and I've also tried creating the template in the Matlab path where my files exist, just in case there was a path issue.

When I type: ppt=saveppt2('Test_1','Template','Test_1_Template.ppt','init') I get the error message:

"Error using Interface.91493462_5A91_11CF_8700_00AA0060263B/Open

Invoke Error, Dispatch Exception:

Source: Microsoft PowerPoint 2010

Description: PowerPoint could not open the file."

If I omit the 'Template' call and just use 'Test_1_Template.ppt' as the ppt to open (using this as my save file, instead of a template), it opens fine and the figures are saved to the end of the template.

Anyone know why it wouldn't be able to open as a template?