Hi, and welcome, Robo_Newbie
You're about to become Robo_Oldie real quick
Your RoboHelp projects MUST live on a local drive. You can archive them on a network, but NEVER actually open and edit while they are on the network.
The two reasons most people incorrectly assume they should be on the network is because you want to share with other authors and you want to back them up in case your hard drive crashes. Those are valid reasons, but it doesn't work because the .CPD (an Access database cache file) typically becomes corrupted - not to mention the perfomance issues related to LAN latency.
So what most of us do is to either use the free RoboSource Control that comes with RoboHelp or to work out a manual routine of copying your current work to a LAN for safekeeping and establishing a routine with the other authors on who will work on what, when.
Sorry to break the bad news. That's the reality.
Adobe Certified RoboHelp and Captivate Instructor
Thank you both for these quick replies! My users will be disappointed to know that their method of using the network drive as they have in the past will no longer work. But that appears to be the fact of the matter. Well, we will perhaps have to utilize one of the suggested methods for sharing files amonst users. Again, thanks for the fast replies, this has been most helpful. I am marking this question as "answered".