When the path to the layout file is dynamically assembled directly in the call to CreateWidgets, it sometimes fails to create widgets (returned widget is NULL).
Sporadically failing example:
```
Widget widget = GetGame().GetWorkspace().CreateWidgets( "path/to/layoutfiles/" + rows.ToString() + "/GridSpacer" + columns.ToString() + ".layout", parent );
```
The work-around is to assemble the path outside the call, and then passing it in:
Working example:
```
string layout = "path/to/layoutfiles/" + rows.ToString() + "/GridSpacer" + columns.ToString() + ".layout";
Widget widget = GetGame().GetWorkspace().CreateWidgets( layout, parent );
```