While connected to a VPN, I have to use a proxy to connect to the internet. Normally the proxy config file is located in an online location, and the web browser LAN settings is pointed to that. I wanted to make a few modifications to make things more efficient, and so I downloaded the .pac. However, when I point Internet Explorer to the identical local copy, the proxy no longer works. The local copy works perfectly with Chrome. What could be causing this?
Perhaps the VPN login is enforcing a Group Policy setting? When logged in on the VPN, can you check the proxy settings?
Perhaps you could post the pac file somewhere so we could check it.
alert() to raise alert messages to see what is actually happening as the file is processed.