Global Stop Criterion (Number of Iterations)

The first stop criterion is the maximum number of optimization iterations which is default 50. When the maximum number of optimization iterations is reached the optimization algorithm always stops independent upon the values of the two previously mentioned criteria. The allowed maximum number of optimization iterations can be increased or decreased by the user. This is done by modifying ITER_MAX in the STOP command

STOP
 ID_NAME = global_stop

 ITER_MAX = 55
END_

where ITER_MAX is increased to 55.

Important: The global stop criterion is defined using a STOP command whereas the convergence criteria are defined in the optimization settings ( OPT_PARAM command). The global stop criterion leads to a hard stop of the optimization - independent of a complete convergence of the result (in particular with a small number of iterations this cannot be achieved). For the controller-based algorithm the number of iterations required for full convergence is set using the SPEED= ITER,<nr> parameter in the OPT_PARAM) command.