Hi,
To analyze you may have to answer some questions as listed below.
1) Have you run any example case successfully from the Telemac example folder, with more that 4 processor (Even in Coupled Telemac3D/Tomawac mode)? If they are running properly then we can probably ascertain that the setup is proper.
2) Did you face the problems with the example cases as with the current case?
3) In the coupled Tomawac/Telemac3D simulation are you using any customized FORTRAN function for the particular case.
With Best Regards,
Gourish