Getting warning, but model works well

Specific Domains Modelling & Simulations
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1

I am getting this warning during mtkcompile, while I was not getting it before. It might be related to an update in StructuralTransformations. The model still works fine. How can I disable the warning?

┌ Warning: Internal error: Variable (l0(t))[8] was marked as being in 0 ~ -(stiffness(t))[8] + ifelse(
(len(t))[8] > (l0(t))[8], (0.7853981633974483stiffness_frac*SymbolicAWEModels.get_e_tether(pset)*(Symb
olicAWEModels.get_diameter(psys, 8)^2)) / (len(t))[8], (0.7853981633974483stiffness_frac*SymbolicAWEMo
dels.get_e_tether(pset)*(SymbolicAWEModels.get_diameter(psys, 8)^2)*SymbolicAWEModels.get_compression_
frac(psys, 8)) / (len(t))[8]), but was actually zero
└ @ ModelingToolkit.StructuralTransformations ~/.julia/packages/ModelingToolkit/vyvd9/src/structural_t
ransformation/utils.jl:291
2

Warning are not error so your code is working fine. You simply ignore warning.

3

I am getting this warning hundreds of times, so it is definitely an issue for me, and it is not clear to me what is wrong with my code.

4

Does it happen with @register_array_symbolics ?
In my case, the easiest solution was to use Suppressor.jl.

5

Yes, I do use @register_array_symbolics. I did not have this warning before, it came after an update of some package, therefore I don’t want to suppress it.

6

Open an issue with a reproducer. Generally this message is harmless but it likely shouldn’t be there…

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