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When I have a bunch of modules open, and I build one within the IDE, the classpath scanning dialog briefly appears. Why? The IDE is what is doing the building - it should have up- to-date info directly from the sources - there won't be any new information in the new jar. (If we can't tell that the jar change was caused by the IDE, there should probably be an API to make that possible).
It is simple, by rebuilding one module the classpath of dependent modules has changed.
*** This issue has been marked as a duplicate of 51651 ***