I have suddenly encountered this really weird problem, where 2018R2 runtime manager no longer starts up when I try to run any of my projects. However, the demo projects included runs just fine. This has happened also across machines, and on both Win11 and Win10 OS. I recently installed the 2024 update of Autocad LT across the same machines, and it affects al of them.
When installing 2018R2 onto a "blank" machine Citect plays ok, until Acad2024 Lt is installed and then it won't launch runtime manager any more. What is a huge problem is that uninstalling LT doesn't help restore the function of the runtime manager, nor does uninstalling any other sideprogram installed by Autocad. Reinstalling 2018R2 doesn't help either. Seems some DLL perhaps have been swapped out and I have no good idea about how to find it or fix it. Anyone else seen this?
So if anyone has a good idea for troubleshooting this crashing runtime manager thing, I'd really appreciate it! Otherwise it seems only possible solution is to reinstall the whole computer