convergence issue

Hi all,

during simulation with ADE L I get the following error: 

(SPECTRE-16927): Transient simulation reaches maximum allowed number of convergence failures below minstep within 5% of stop time.
Change option `max_minstep_nonconv' to adjust the allowed maximum number of convergence failures below minstep.
Last acceptable solution computed at 10.0042 ns.

where is such 'max_minstep_nonconv' parameter set?

Thank you

best regards