Dynamic tolerance with Spectre X?

Is it possible to dynamically alter the spectre X tolerance in a transient sim?

For APS this can be done by changing the "errpreset" variable between conservative/moderate/liberal.

Spectre X accuracy mode is preset on the command line though with the +preset=vx/lx/mx/ax/cx,

is there a way to change this with a dynamic parameter?

Thanks in advance!