Thank you Flappie for your response.
I did but with no success.
I've found these errors in the log file:
.....
2021-08-22 13:46:01.683 ERROR EDOBJECTS: Destruction shape not found AVIASHTAB_CRASH
2021-08-22 13:46:01.684 ERROR EDOBJECTS: Destruction shape not found GAZ-66_P_1
2021-08-22 13:46:01.684 ERROR EDOBJECTS: Destruction shape not found KAMAZ-FIRE_P_1
2021-08-22 13:46:01.686 ERROR EDOBJECTS: Object AV8BNA_AERO1D_EMPTY with id=299 already declared in table ContainerTable
2021-08-22 13:46:01.686 ERROR EDOBJECTS: Object M2KC_02_RPL541_EMPTY with id=603 already declared in table ContainerTable
2021-08-22 13:46:01.686 ERROR EDOBJECTS: Object M2KC_08_RPL541_EMPTY with id=604 already declared in table ContainerTable
2021-08-22 13:46:01.686 ERROR EDOBJECTS: Object M2KC_RPL_522_EMPTY with id=605 already declared in table ContainerTable
2021-08-22 13:46:01.686 ERROR EDOBJECTS: Object HB_F14_EXT_PHX_ALU with id=320 already declared in table MissileTable
2021-08-22 13:46:01.686 ERROR EDOBJECTS: Object X-59M with id=54 already declared in table MissileTable
2021-08-22 13:46:01.915 ERROR WEAPONSBASE: invalid cx data <weapons.missiles.MBDA_Mistral><./CoreMods/aircraft/SA342/SA342_Weapons.lua>
2021-08-22 13:46:03.274 WARNING LOG: 1 duplicate message(s) skipped.
2021-08-22 13:46:03.274 ERROR wInfo: negative weight of payload "{AN-M57_MER_5_R}"
2021-08-22 13:46:03.274 ERROR wInfo: negative weight of payload "{AN-M57_TER_2_L}"
2021-08-22 13:46:03.274 ERROR wInfo: negative weight of payload "{AN-M57_TER_2_R}"
2021-08-22 13:46:03.274 ERROR wInfo: negative weight of payload "{AN-M57_MER_5_L}"
2021-08-22 13:46:03.275 ERROR wInfo: negative weight of payload "{AN-M57_MER_6_C}"
2021-08-22 13:46:03.275 ERROR wInfo: negative weight of payload "{AN-M57_TER_3_C}"
2021-08-22 13:46:03.276 ERROR wInfo: negative weight of payload "{TER,LAU-61*3}"
.....
Do you have an idea ?