nandrai,
Sorry that you are seeing this issue.
I’m afraid there could be some internet connection problem when you are uninstalling the plugin. Can you make sure you have no problems with your internet connection and then try uninstalling the plugin again ?
Can you please clarify whether any other plugin is being installed at the same time when you are trying to uninstall the subclipse plugin ? If yes, please mention the plugins that are being installed and the plugins that are being uninstalled so that we can try it at our end.
I recommend you upgrade to our latest version MyEclipse 2014, based on Eclipse kepler which has many fixes and new enhancements. You can download the latest version from here. To see what’s new in this release, please read the New and Noteworthy. You can install MyEclipse for spring 2014 in a different location (alongside your existing MyEclipse for spring 10.6) and can use the same license which you have currently, as our licenses are time based not version based.
Let us know how it works for you.