Troubleshooting: Why does the Redliner Extension require Mobile?
The Redliner Extension provides access to the Graphics Tab and Session Manager. The Redliner Extension requires Mobile because the graphics created by Redliner are stored in Mobile packets. This allows users to share these graphics with others using Session Manager.
ArcFM Viewer (with ArcGIS for Desktop Basic)
You may use the Redliner Extension without Mobile configured and without a Redline session open. However the only way to save these graphics is to save them to a map document. If you don't save the map document (.mxd), the graphics will be lost.
ArcFM Viewer for ArcGIS Engine
ArcFM Viewer for ArcGIS Engine does not provide the option to save a map document. This leaves no way to save graphics without Mobile. Therefore, the graphics tools (e.g., Graphics tab, Ink tools) are enabled only when a Redline session is opened.