Multisim and Ultiboard

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Need help in this simulation 3phase rectifier connected to a 3 phase inverter

Hello everybody,
I am trying to simulate the connection from a rectifier + inverter group to the network to then be able to calculate the current distortion that is injected into the network.
The circuits work individually but when I try to join them and start the simulation I always get a non-convergence error!
I changed the options of the parameters ABSTOL, VNTOL and RELTOL but I still have no results.
If anyone has any idea how I could do I leave the file below.
Thank you in advance

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