Hello all,

I am currently developing a multiple-step Explicit Foot model with the final goal to create a dynamic simulation of the stance phase. To do so, based on previous literature, my idea is to create two explicit steps where the platform (PIANO-1) rotates around two different reference points (RP), simultaneously. The 2 point are defined as following: one in the calcaneus and the second one on the metatarsal part.

To create each rotation I have settled two MPC contraints, where the control points are the RPs and the secondary nodes are the upper surface of the platform (same in both MPC constraints).

However, when I summit the job, the simulation gets aborted right away and the following error appears: "Redundant boundary conditions defined at node 1 instance PIANO-1 which is involved in at least one other constraint.

Due to errors encountered in the packager phase, the output database was unable to be constructed. Node sets referenced by prior warning and/or error messages will not be available.

Abaqus/Explicit Packager exited with an error - Please see the status file for possible error messages if the file exists."

Does anybody can help me to solve this error please? Any suggestions, help or questions would be greatly appreciated! Thank you in advance

Naia