Hi guys
am new to houdini but am trying to catch it
now when I edit the parameter interface and adding a flaot to the interface and i give it a name like (( mult )) or any other name
when i try to use it in expression houdini gives me error and telling me its undefined
so what is my mistake or what I miss ??

hi!
make sure your syntax is correct:

ch(“mult”) is the right format

still not working
the problem not the syntax
it not recognize the function it self
so the program cann't call it

When I doubt, I right-click the label of the parameter and choose copy parameter. Then I go to wherever I want to write my expression, right click the label (or parameter field) and choose paste relative reference. It'll fill the field with the right expression syntax and then I continue editing the expression to my liking.

Cheers