You can try to refine the mesh. Try to find this option in the settings, otherwise ask other members in this forum who have experience the same error.

One way to check your FEA result is to perform a mesh convergence study although you might experience singularity at junction, where the result never converge. But I believe the software have considered already a distance as a function of R/T from the junction, in which results can converge. Just confirm.

Warm Regards,