Error in kinematic analysis

Hello everyone,

seventeen subjects have been recorded by Xsens MVN Awinda inertial motion capture system with 17 wireless motion trackers and an update rate set to 60 Hz.
I am interested in estimating the Ground Reaction Force out of the BVH files. Here, the Xsens T-pose is in the beginning of every BVH file I am going to analyse. Thus, I was loading the inverse dynamic model, running the BVH_PreProcess and started to run the analysis. Some estimations succeeded, others resulted in errors. While analysing the BVH data of two different subjects I got errors during kinematic analysis. It is said that the constraints are above tolerance.
Please find one screenshot attached. I would be happy if you could assist me in how to proceed.

Many thanks and best regards,