Has there been a change to Monte Carlo simulation hack using ".step param X 0 1500 1"

I have been using the ".step param X 0 1500 1" method to step through monte carlo simulations in the past successfully.  Now I am receiving errors on component "mc" values:

C:\Projects\SPICE\Voltage Driver 2025Nov10.net(12): Expected "}" here.
C72 N012 0 {mc, 0.01u, 0.55}
^^^^^^^^^^^^^^
C:\Projects\Voltage Driver 2025Nov10.net(12): syntax error
C72 N012 0 {mc, 0.01u, 0.55}
^^^^^^^^^^^^^^