When I run the Kinematic tool for my FreePosture model I always get this error near the end:
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Kinematics (Operation: Main.Study.Kinematics):
0.0) PreOperation (Operation: Main.Study.Kinematics.PreOperation):
0.0.0) InitialConditions (Operation: Main.Study.InitialConditions):
0.0.0) …Design variables have been updated.
0.0.1) …Load-time positions have been re-established.
0.0.2) …Kinematic analysis completed. The kinematic constraints have been resolved.
0.0.3) …Initial conditions are fully updated.
Kinematic analysis…
ERROR(OBJ1) : C:/U…s/j…1/A…a/R…g/A…y/D…s/A…o/A…n/M…s/M…e/M…l/I…s/TrunkDrivers.any(8) : PelvisGroundDriver : Time, ‘t’, has an invalid value for this interpolation
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What does this mean? I’m using the same time array for all of my drivers.
Could this error have something to do with the kinematics solver type in the AnyBodyStudy?
I have just started looking into motion capture models. I looked into the AnyInputBVH class example (from the reference manual) and I tried to go further by adding a human model. I added the same BVH file from the example into the free posture model and the Human template, changing the tStart and tEnd correspondingly. In both the cases, I observed that putting the conditions:
gave me the error:
ERROR(OBJ1) : C:/U…s/d…1/D…p/A…s/M…N/A…H/F…e/CodeBVH.any(1) : BVH_Model.Model.Hips.Driver : Time, ‘t’, has an invalid value for this interpolation
If I comment out these two lines, then the kinematic analysis goes ahead without any problems.
I am using AnyBody v6.0.7 and AMMR 1.6.5. Could you explain to me why this happens?
Thanks for writing here and we know that sometimes such a situation may happen when soft kinematics solver is enabled as you mentioned.
A very quick solution which may be helpful to solve this issue is to narrow down the gap between tEnd and tStart values in the AnyBodyStudy class instance.
I tried your suggestion in the code and it solved the problem. However, I do not understand what exactly happens and how narrowing the time range solves the problem. I am afraid that if this solution fails in another case, I will be clueless about how much the gap should be narrowed… Anyway, at least I will know where to write then