In loading a project developed by a previous programmer, I received such a type of error. Description Resource Path Location Type component SimpleMarkerSymbol is defined more than once in this namespace. Remove the mapping to com.esri.ags.symbol:SimpleMarkerSymbol or com.esri.ags.symbols:SimpleMarkerSymbol Then I serached com.esri.ags.symbols:SimpleMarkerSymbol but did not find anything in the project. How can I eliminate this error? Thanks.