In this case my Talend Studio is on a vm-server. There, unfortunately, the C-disk was already full when I opened a job in Talend. Talend aborted. I deleted some backup-files to make disk-space available then opened Talend again. Surprisingly, the job is no longer visible in the project despite the fact that it still exists in the process subfolder of the workspace. It's not possible to reimport the job from this subfolder. - What can I do?