Failed to retrieve message for "MgClassNotFoundException". - REST_Request_Hello.Execute line 205 file c_RestHandler_Data.cpp - Execute_Get_Class_Feature line 1214 file c_RestHandler_Data.cpp - MgCommand.ExecuteCommand line 120 file e:\build\2017\re_ims2017_46_1-6376417\ent\os\common\mapguidecommon\Services/Command.cpp - MgCommand.GetResponse line 190 file e:\build\2017\re_ims2017_46_1-6376417\ent\os\common\mapguidecommon\Services/Command.cpp - MgClassFactory.CreateMgObject line 60 file c:\working\build_area\mapguide\3.1.2\x64\mgdev\common\foundation\System/ClassFactory.cpp