I am a VBA newbie, and have leveraged the knowledge base here to bootstrap my coding. I have run into a strange problem that I am hoping one of the experts can help.

For compatibility with an Add-in that I have, 90% of my program is in Module4, while one subroutine is in Sheet1.
I have a line in my Module4 program

Call Sheets(1).Matrix_program(1)

In two different Laptops one running Excel 2010 and one running Excel 2013 - I have no problems.

In two other Laptops (running Excel 2013) I get the following error
Run-time error '32809':
Application defined or object-defined error

I have reinstalled Excel as well as the Add-In. No luck. It just seems that in these two Laptops, something is preventing calling a subroutine in Sheet1 from a Module.
I have looked through the Security settings, but do not see any difference.
Any suggestion would be welcome.

Thanks

- indra

In the problem