[kiddosuper]

For those who encounters this error , just to show how I solve it


if your cpu is intel (12th generation, 12700) , which has P-core 8, E-core 4
OS: LINUX X86_64, under Almalinux 8 /9 or opensuse leap 15.3, cfx 19.0



Whenever you cfx5-solve by parallel (either intel mpi or openmpi)
solver will stop with error: free(): invalid next size (fast) (shown in console terminal)
and in out file, will show Stopped in routine FPX: SIG_HANDLER



that is due to the cpu setup , just turn-off the hyperthreading in BIOS , then solved!!