Layer Visibility

Error: Invalid argument(s): [1] = "" The session ID is invalid because the session separator character was not found. - MgUserInformation.SetMgSessionId() line 212 file c:\working\build_area\mapguide\3.1.2\x64\mgdev\common\mapguidecommon\System/UserInformation.cpp

GetVisible() returns the state of the visibility flag for a given layer (the check box in the Layers pane). IsVisible() returns the actual visibility of a layer, based on its visibility flag, the visibility flag of any groups that include the layer, and whether the layer has a defined style for the current view scale.