But === This command allows Code_Aster to be chained with the ECREVISSE software. For each step of time, the principle is based on a successive call to: * THER_LINEAIRE to obtain the thermal state of the structure * STAT_NON_LINE to obtain the mechanical condition of the structure * to code ECREVISSE to find out the fluid flow conditions. **Note** *You must specify the keyword* DEBUG =_F (HIST_ETAPE =' OUI ') *in* DEBUT *or* POURSUITE *to use* MACR_ECREVISSE *.*