You can terminate a running job, if necessary, with the help of system functions such as a system break, issuing a kill signal, or deleting the entry in the batch queue. This is not the preferred method for nonlinear analyses, because a job terminated in this manner cannot be restarted.

To terminate a nonlinear analysis "cleanly" on a multitasking operating system, create an abort file, named Jobname.abt (or, on some case-sensitive systems, jobname.abt), containing the word nonlinear on the first line, starting in column 1. At the start of an equilibrium iteration, if the program finds such a file in the working directory, the analysis stops and can be restarted at a later time.