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Created attachment 284354 [details] Model Explorer is empty. Error alarming all the time when navigating in UI An error has occurred. See error log for more details. org/eclipse/ui/internal/misc/StringMatcher Eclipse Modeling Tools Version: 2020-09 (4.17.0) Build id: 20200910-1200
Please attach the .log from your workspace/.metadata dir.
Created attachment 284355 [details] Log file in attacment Log file in attacment
Moving to Papyrus for comments.
org.eclipse.papyrus.infra.widgets.providers.PatternViewerFilter should use, depending on the precise use case, either * org.eclipse.core.text.StringMatcher (requires bundle org.eclipse.core.runtime 3.18.0) or * use org.eclipse.ui.dialogs.SearchPattern (long-standing API that can be used for the functionality of the removed *internal* class org.eclipse.ui.internal.misc.StringMatcher. See https://www.eclipse.org/lists/cross-project-issues-dev/msg17763.html where the removal was announced.
Please discuss in 567323. *** This bug has been marked as a duplicate of bug 567323 ***