diff --git a/chemclipse/plugins/org.eclipse.chemclipse.ux.extension.ui/src/org/eclipse/chemclipse/ux/extension/ui/provider/DataExplorerLabelProvider.java b/chemclipse/plugins/org.eclipse.chemclipse.ux.extension.ui/src/org/eclipse/chemclipse/ux/extension/ui/provider/DataExplorerLabelProvider.java
index 170ff19362..e1d00c0d08 100644
--- a/chemclipse/plugins/org.eclipse.chemclipse.ux.extension.ui/src/org/eclipse/chemclipse/ux/extension/ui/provider/DataExplorerLabelProvider.java
+++ b/chemclipse/plugins/org.eclipse.chemclipse.ux.extension.ui/src/org/eclipse/chemclipse/ux/extension/ui/provider/DataExplorerLabelProvider.java
@@ -81,7 +81,9 @@ public void update(ViewerCell cell) {
 		Image image = getIcon(element);
 		// https://github.com/eclipse-platform/eclipse.platform.swt/issues/678
 		Display.getCurrent().asyncExec(() -> {
-			cell.setImage(image);
+			if(!cell.getControl().isDisposed()) {
+				cell.setImage(image);
+			}
 		});
 		cell.setBackground(getBackground(element));
 		cell.setForeground(getForeground(element));