Thursday, April 25, 2024 - 08:18 by Anonymous (not verified) Read status unread Listings leJOS NXJ Plug-In Error code 4 Error message Cannot continue the operation. There is another install operation in progress. Installable Units Reported org.lejos.nxt.ldt.feature.feature.group,0.9.0.201202141552 Detailed Message Cannot continue the operation. There is another install operation in progress.