In the past I've had this problem.
I opened the scene file and found that there was a glitch -- there was no reference to the hip geometry. So I copied and pasted from the abdomen (changing abdoment to hip) and all was good.

actor hip:1
      {

      }
actor abdomen:1
      {
      storageOffset 0 0 0
      geomHandlerGeom 13 abdomen 
      }

you want to change this to
actor hip:1
      {
storageOffset 0 0 0
      geomHandlerGeom 13 hip
      }
actor abdomen:1
      {
      storageOffset 0 0 0
      geomHandlerGeom 13 abdomen 
      }