simpleeval.NameNotDefined: 'b' is not defined for expression 'a * b + 1'

[Zackanory]

I get this error when I try to run the basic workflow template supplied by ComfyUI. It occurs in the MathExpression node between Duration and EmptyLTXVLatentVideo. The duration I set is 7.0 which is the length of my mp3 in seconds. As far as I know I have the latest version of everything because it is the first time I tried LTX and I downloaded everything today. Thanks.

P.S. I probably should have said that it is the Image Audio to Video model that I am using.

[bitsofintelligence101-lab]

any update on this? I get the same error