SQL Developer 4.0 inherited the system_cache requirement from the latest JDeveloper IDE framework on which it is based. To avoid the maximum space limitation your admins have placed on the roaming profile, try adding a line to your sqldeveloper.conf file:
where <path> begins with something other than %APPDATA%
Hope this helps,
SQL Developer Team
Try running sqldev with the option -J-Dorg.netbeans.core.update.all.resources=never or by setting
in your sqldeveloper.conf file. For all possible values of this property--never, missing & always) see the bug we used to track this:
Thanks, Stoyan. That did the trick.