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Dear all,

When I run a 2.5D simulation with a coordinate transformation and an extra passive scalar transport, I get the following error:

CG iterations made = 5001 using tolerance of 1e-09 (error = -nan, rhs_mag = 1)

Fatal : Level 0 assertion violation

Exceeded maximum number of iterations

However, if I repeat the simulation without the passive scalar transport, it proceeds correctly.

Has anyone else encountered the same problem? If so, would you be able to assist me in resolving it?

Thank you in advance for youe help,

Antonio.