7I97T PWMGen Dither and Firmware Version

LinuxCNC Version 2.9.2
Mesa 7I97T + 7I76 Firmware 7I97t_7;i76d
Mesaflash 3.5.9

When attempting to enable PWM Dithering I'm getting the resulting error:

     ./main.hal:63: parameter or pin 'hm2_7i97.0.pwmgen.00.dither' not found

I see in the HOSTMOT2 manual that "PWMGen firmware version 1 or greater" is required for dither.  Is this the problem?  How can I determine which version of the PWMGen firmware my card has on it?  Is this the likely issue?

Thanks,

Skylor

You can determine module versions with mesaflash's --readhmid option

 

Its possible only the base configuration (7i97t_d.bin) has been
updated to include version 1 PWMgens

7I97T+7I76 with version 1 PWM firmware:

 

 

Thank you!