2. update does not work

Klaus,
I haven’t given up yet, just trying to figure out other strategies. I have read and re-read through this thread multiple times and all the errors you are getting are always indicative of an installation problem or a corrupted install of some kind, either caused by installing things incorrectly or manually overwriting plugins that are part of the install or adding incompatible plugins to your install manually (like dropping new versions of EMF/GEF/etc. directly into the /plugins directory). But given when you have said it doesn’t sound like you are doing any of this and MyEclipse is just dying after a week or so of use, which unfortunately doesn’t make sense… so it’s leaving me in a hard-to-diagnose-and-trouble-shoot position.

If the behavior you were seeing were the norm for clean/working installs, we would have many more people complaining of the same issue… so I’m trying to figure out, by guessing, what is different about *your* setup or what you are doing that is causing this stuff to go wrong.

I know you have tried the steps below, but let’s try them again just for the sake of sanity, exactly in the order I specify just incase one of the smallest details is what is causing the problems.

1. Download the MyEclipse 5.5.1 All in One installer, should be around 190MB in size.
2. Install to a brand new directory, like C:\Program Files\MyEclipse 5.5.1 AIO
3. Run it, but this time create a new workspace
4. After it starts up, make sure the update manager is only prompting you to add M4M… if you would like, go ahead and add it.

At this point I want to make sure this clean setup works… can you create some sample projects and work with them for a bit, and try restarting and making sure everything behaves as it should?

If things are working, I would suggest using File > Import > Existing Project, to pull your projects from your old workspace into the new one.

natewaite,
Was the Update shown to you by the Quick Installer or did you invoke it using the Eclipse Update manager?

Also have you tried restarting using -clean?
https://www.genuitec.com/forums/topic/troubleshoot-using-the-clean-command-line-argument/