I have read in the manual that setting to T the expert parameter "monitor residuals" that is inside I/O control you can later, in the post, see the different residual values. But I don´t have this option, why? what can I do to now where do i have a problem in the solution?

explanation on the manual: monitor residuals When set to T, outputs maximum residuals and locations for each coefficient loop in a steady state simulation or for each timestep in a transient simulation).

Look under the expert parameters tab in Pre.

But there isn´t a monitor residuals option. Is the same using "monitor scales" or what should I do? Thanks for answering.

Within Solver, choose Tools / Edit Definition File / Add Expert Parameter Section. Highlight Expert Parameter Section and then Add Parameter and choose from list.

Thanks. Using this parameter is the same as choosing "monitor residuals" on the output control at pre??