When you have a command such as this on a schematic:
? ??.options cshunt=1e-14
? ? + noopiter
? ? + gminsteps = 0
it is essential to have all three lines in the same SPICE Directive.? But in the schematic you uploaded, the second and third lines and the first line are in separate SPICE Directives.? You can't control how the lines are ordered in the SPICE Netlist (well, actually you can, but it is not how you'd expect, it depends on the order they were added to the schematic).? As a result, the "+ noopiter" and "+ gminsteps=0" come after and add to your ".tran" line, and that doesn't work.
That causes an error, and your simulation can't be run.
Remedy: put the "+ noopiter" and "+ gminsteps=0" lines in the ".options" line's SPICE Directive.
Andy
