Comment (by Taishi Ikeda):

Do you mean “use_jacobian = true“? If you have a look at line 254 of Scalar_calc_Tmunu.F90, you can see that there is an if statement that uses the combination "compute_fluxes==1" and "use_jacobian=false".

Oh, yes, sorry.. This is my typo. My point is that compute_fluxes ==1 with use_jacobian == true is not available. So, we should add comment saying “Flux can not be computed with multipatch“.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2485/include-complex-and-real-scalar-evolution