formula node: variable undefined

[TomR2800]

Aug 4

Group:

I'm trying to use the 'formula node' to calculate cumulative lethality.  the inputs are 'x' (temperature), 'z' (z-value), 'r' (reference temperature) and 'T' (elasped time).  The error message 'variable undefined' isn't very helpful.  I've included a snippet of the code.  I would appreciate if someone could tell me what is not defined.

thanks

tom

[billko]

It was helpful enough for me to google this:

http://digital.ni.com/public.nsf/allkb/653826439C4F583A8625737900782831

Does that help?  I had a kind of hard time understanding it.

[TomR2800]

Aug 4

billko, thanks for your help.  Yes indeed, L was not defined.  Now it works

Tom

[billko]

Whew!  It was kind of hard for me to understand.  I couldn't even translate it for you.  I had to just post the link.