For everyone's benefit, I've posted a sample package
here that copies a file from one location to another. You can import this package into your Lansweeper installation by following
these instructions. This package works for me and returns a Stop(Success) message after the file is copied. I used a basic Command step.
I'm personally unable to reproduce the issue described in this post, i.e. Lansweeper successfully running the command but not returning a Stop(Success) message. It wasn't clear to me from the initial post in this topic that this was what was happening either. I assumed the command just wasn't being executed at all.
In general, in case of deployment issues, we recommend
updating your Lansweeper installation (as we did fix some deployment bugs recently) and then manually testing the result command of your deployment step in Command Prompt on a client machine.