Sunday, June 9, 2024 - 07:42 by Anonymous (not verified) Read status unread Listings UMLet - UML Tool for Fast UML Diagrams Error code 4 Error message Cannot continue the operation. There is another install operation in progress. Installable Units Reported umlet-eclipse-feature.feature.group,15.1.0 Detailed Message Cannot continue the operation. There is another install operation in progress.