Hi,
Sorry - we tightened up the Spatial Reference requirements when initializing layers - you can still just use a GroupLayer but you need to:
- Open the Map Document (MXD) which only contains a Group Layer
- Open the DataFrame Properties dialog
- Set the property ‘Extent Used by Full Extent Command’
By default it is the ‘Extent of data in all layers’, which is effectively null when the map only contains a GroupLayer.
Cheers
Mike