1. But

This operator makes it possible to redefine the distribution mode of the finite elements of a model for parallel calculation.

The finite element partition is stored in SD_MODELE (maintained on a global basis). When you are in pursuit, it means continuing with the same number of processors. This is not necessarily a desirable step. To get around this difficulty, the MODI_MODELE command allows you to redefine the model partition.

Modifies the model data structure (re-entering operator).