It's a glitch. There is a way to force the roof to close bypassing the pinch sensor. According to the manual you hold the close button for 10 seconds and the roof should close. That might be important if its raining.

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Pan

2012 650i xDrive|Vermillion Red Metallic | Cinnamon Brown Nappa Leather | Fine Line Oak Wood Trim | ARS | 20" Wheels | Active Cruise Control | HUD | Night Vision | LED Lights | Heated seats | Heated Steering Wheel | Ski bag | Active front seats | Premium hi-fi system | Satellite radio | Plus more

Former ride 2010 Deep Sea Blue 650i