Question: Non-fatal error while reading data from kernel

I am trying to solve two differential equations numericaly:


The output of the dsolve command is "Non-fatal error while reading data from kernel." (Finding the symbolic solution without the "numeric" and "range" parameters with dsolve gives the solution but I need to solve using the numeric parameter.)

I thought the problem was coming from the imaginary element in the first equation. But I can solve:



without problem. What can be the origin of this problem?

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