I am trying to elevate the middle section of the roof of the building but I received this error can you please help thanks for your time.

Rodgers - you can only raise edges on sections with parallel  edges. The cut out at the bottom precludes this in this case. Please see this document for assistance.

Regards,

Rodgers - you can only raise edges on sections with parallel  edges. The cut out at the bottom precludes this in this case. Please see this document for assistance.

Regards,

Thanks Duncan