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[ JDK VERSION : J2SE 1.5.0_02 ] In NB 4.0, when red underline was corrected by fixing some other file you could get rid of it by just doing and undoing some edit on the line. In NB 4.1 however the red lines (and cross icon) keep coming back after a second or two, even though the source compiles fine. Closing and reopening the source doesn't help.
Looks like java module issue, reassigning
What build of NetBeans are you using? Have you saved the other file before doing and undoing the change in the file with the error annotation? Could you give a concrete example of how the files look like and what steps exactly you made?
Apparently I forgot to enter the buildno when I filed this bug. Bad bad me! I've just tried to reproduce the bug with 200502281900 and can't. Don't know if some bug has been recently fixed that could affect this so I'll leave it to you to change the issue status. If it happens again I'll just reopen it.
OK, closing for now as works for me. Next time it happens please provide more details. Thanks in advance.