Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: #0 0x7FFFF636DBF7 #1 0x7FFFF636CDF0 #2 0x7FFFF565224F #0 0x7FFFF636DBF7 #1 0x7FFFF636CDF0 #2 0x7FFFF565224F #3 0x56C339 in nb_adjust_ #0 0x7FFFF636DBF7 #3 0x56C339 in nb_adjust_ #4 0x56E268 in ewald_force_ #4 0x56E268 in ewald_force_ #1 0x7FFFF636CDF0 #5 0x7AAF93 in force_ #5 0x7AAF93 in force_ #6 0x4E3712 in sander_ #6 0x4E3712 in sander_ #7 0x4D93A6 in MAIN__ at multisander.F90:? #2 0x7FFFF565224F #7 0x4D93A6 in MAIN__ at multisander.F90:? #3 0x56C339 in nb_adjust_ #4 0x56E268 in ewald_force_ #5 0x7AAF93 in force_ #6 0x4E3712 in sander_ #7 0x4D93A6 in MAIN__ at multisander.F90:? [cnode0846:74542] 2 more processes have sent help message help-mpi-runtime.txt / mpi_init:warn-fork [cnode0846:74542] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages