topic Re: Reserved / invalid Parameter names? in Fusion Support Forum

Reserved / invalid Parameter names?

Anonymous — Wed, 31 Jul 2019 17:10:43 GMT

In trying to match the data sheet for a machined pin design, I'm naming the various parameters in my model according to the data sheet. These are single-letter dimension names (length, radius, etc) such as "D", or "Q".

I'm finding that Fusion doesn't like certain single-letter parameter names, and will not allow me to create these, but I don't know why.

The single letters A,C,E,F,H,J,K,L,N,R,S,T,V,W are not allowed as parameter names (though lower-case seems fine). If I try to use any of these as parameters in (e.g.) a sketch, they don't appear to map to any values (or at least not in mm or degrees).

Anyone know why these letters in particular are forbidden?

EDIT: Apparently there is a whole other set of single-letter lower case names that are also invalid (different from the above).

Re: Reserved / invalid Parameter names?

jeff_strater — Wed, 31 Jul 2019 17:46:43 GMT

any character which can be interpreted as a unit specifier is disallowed as a parameter name, because that would make parsing an expression impossible. For instance, you cannot use "m", "mm", or "cm" as parameter names. Here is the list of unit types:

Re: Reserved / invalid Parameter names?

Anonymous — Wed, 31 Jul 2019 19:54:54 GMT

@jeff_strater Makes total sense. Thanks!