The user client is already running
on 14 August 2020 09:51 PM
“Help! I’m a PaperCut systems administrator and my users are reporting that they see an error message “The user client is already running. Only one instance of this program can run at the same time.” Why does this happen and how can we prevent it?”
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As the error suggests, this indicates that something is attempting to start the user client from multiple points. When the first instance of the client starts it will lock all the files it needs; if you attempt to run a second instance of the client, that instance is swiftly denied access to the locked files and sent to its room without dinner.
In our manual we discuss several different ways to roll out the PaperCut Client for Windows workstations or macOS computers. If two different methods were used to deploy the PaperCut client, it can result in this error.
One of the most common reasons we see this error is simply because the user is inadvertently attempting to relaunch the client themselves. So as an admin, “user error” should be the first thing to confirm if this error pops up.
Here’s some other items we recommend checking depending on the client operating system.
Windows has a variety of ways to auto-start apps and services, but here are a few common places to look: