I've been trying to use the "install directory" action to copy files to hard drive before running a local installation. The success rate hasn't been very good. Most of the time I'll get a message "could not find the file <filename> to install". Every now and then it works like a charm just like I want though. If I use "Copy Directory" and point the source to a UNC path on the network, everything works great 100% of the time.

What's the deal?