Project: Eclipse_Platform_UI
Bug 12906 [Editor Mgmt] If file is already opened in one editor, cannot open in another editor (should give error msg)
Reported: 2002-04-05 16:47:48 | Status: resolved fixed

Make sure you have an assoicate Windows editor for your java file. If not, go to the file explorer, double click on any java file, and select WordPad or notepad as default editor for all java files. In the Java Perspective, right click on the Java file --> Open With .. System Editor. A notepad and wordpad window will pop up with the java file opened. Close it. go to the Java Perspective, open a java file by simply double clicking on it. The file is now opened in the workbench. Now right click on the Java file --> Open With .. System Editor. Nothing happens. The workbench should be warning message saying that you may overwrite changes... and do you want to continue? or error message saying that theh should close all file first. We believe it's a safety feature where WSAD doesn't allow external editing while the file is already opened in WSAD. However, there should be warning

Files changed in fix:
bundles/org.eclipse.ui/Eclipse UI/org/eclipse/ui/internal/WorkbenchPage.java