When running a MuscleAnalysis on a model with locked joints and the locked joint is included in the <moment_arm_coordinate_list>, the program crashes (in the GUI and command prompt).
TO REPRODUCE BUG (in GUI)
Load ARM26 model
Lock a coordinate (i.e. r_shoulder_elev)
Run the attached analysis
I suppose if a coordinate is locked, then it does not make sense to obtain moment arms or moments about that joint, but perhaps an error message would suffice (rather than crashing).
Tim