I opened a new report with the Jaspersoft Studio, then closed it. A blank form -- that's it.
Then I had a (red-marked) error indicating inability to compile a jasper report, so I removed the form from the solution folder (workspace/solution/reportName).
But the error was still there when I re-started Eclipse. Double-clicking on the error caused it to disappear.
But then I had *424* warnings instead of 87. I set Preferences -> Startup & shutdown -> Refresh workspace on startup, but it didn't seem to help. I then tried Preferences -> Workspace -> Refresh automatically. Finally this seems to have solved the problem.
It's not the first time I have obtained hundreds of warnings. Why does this happen?
Thank you,
Don