Hi sherm

actually, I already called getMultibodySystem().realize(state, SimTK::Stage::Dynamics);, but this error still happened.
Do you have any idea about the possible reasons?

thanks again,
jiang

hi all,

I got the error " State Cache entry was out of date at Stage Dynamics. This entry depends on ver
ion 1 of Stage Dynamics but was last updated at version 0."

Does anyone know what "version 1 and 0" means?

Thanks in advance
Jiang

hi Sherm,

The examples are useful. I saved previous states by a handler, and Measurements in MultibodySystem1 is now one step ahead of that in Multibody system2. It seems that it works well now. Thank you for your help.

best regards,
jiang

Hi, Jiang. It usually doesn't matter much in which subsystem you put a Measure, as long as all the related measures are in the same one. The System itself provides a default Subsystem you can use for this purpose if you want. You can in fact use the System as though it were a Subsystem when definin...

hi sherm, Thanks for your rapid reply. You are right. It's my fault that I didn't describe my problem clearly. Measure A and B are in subsystem1, and C in subsystem2. Measure A and B are updated based on C. C is the plus of A and B. It likes a feedback loop where A and B are measured based on C in a...

Thanks, sherm. I am checking my measurement now. I wonder whether the calculation priority will affect the results. Now I have Measure A, Measure B and Measure C. Meaure A and B are independent. Measure C is the plus of Measure A and Measure B. Measure A and B should be conducted before Measure C,bu...

Hi sherm, Thanks for reply, I will have a check. I also have another question, which maybe stupid. Will CPU affect the results? I found the same program generate different results for old and new cpu. Seems that cpus which support AVX2 have high accuracy than those which are not supporting AVX2. Tha...

hi all, I have some question about measurement. Given Measure A ,Measure B ,a State s and a subsystem system Delay measure of A and B are: Measure tmpPM_A=Delay(system,A,aDelay); Measure tmpPM_B=Delay(system,B,aDelay); Case1: double c1 = tmpPM_A.getValue(s)+tmpPM_A.getValue(s); Case2: Measure tmpPM ...

Hi Sherm

Thank you for your reply. As you said, cache values are not initialized to NaN in release mode, which caused
the "Conditional jump or move depends on uninitialised value(s)" error in valgrind. Now my code works well.
Thanks again for your help

Jiang

hi sherm, I am still confused with the system initialization. Does method buildSystem() and initializeState() initialize the cache value such as Qdotdot, QdotError, Zdot, etc. before forward dynamics simulation? Seems that those values were not initialized before simulation even I disconnect all con...