1612 --The installation source for this product is not available. Verify
that the source exists and that you can access it.--

I am randomly getting this error when running the .MSI applications
that I have created. For about a week, they were working fine with no
issues and installing everytime. Then over the last week, while I have
made no changes to the objects, they are suddenly not installing. I
have tried giving the application object full rights to the server it
is stored on, and also giving the users full rights to the server, with
no success.

Thank you for any help.