S3L_lu_deallocate invalidates the specified setup ID, which deallocates the memory that has been set aside for the S3L_lu_factor routine associated with that ID. Attempts to use a deallocated setup ID will result in errors.
When you finish working with a set of factors, be sure to use S3L_lu_deallocate to free up the associated memory. Repeated calls to S3L_lu_factor without deallocation can cause you to run out of memory.