Footing Schedule Length Field

[troberts]

I want to enter a Conditional Statement for a Foundation Field. Revit help says that, A conditional statement uses this structure:
IF (<condition>, <result-if-true>, <result-if-false>)

I want: IF (Length = 0, "See Plan", Length)

I keep getting a "Inconsistant Units" error.

What do I need to do to fix this?

[archjake]

I don't think that you can put in text for a length parameter.
Something similar has poped up in the architecture forums.