Destroys a namelist and frees any memory associated with it. Note you need only destroy namelists created by XPRS_nml_destroy - those returned by XPRSgetnamelistobject are automatically destroyed when you destroy the problem object.

XPRSnamelist mylist;
XPRS_nml_create(&mylist);
...
XPRS_nml_destroy(&mylist);

XPRS_nml_create, XPRSgetnamelistobject, XPRSdestroyprob.