I'm trying to reference a custom vba function from a field formula in MS Project:
I'm in the Gant View:
Right Click on Number1 Column and select Customize Fields.
Highlight field Number1 and click Formula button.
This brings up the formula editor where I enter the reference to my custom (public) function in Module1, for example: my_function("Foo") where "Foo" is defined as a string parameter in the function.
I get the error: "The formula returns a syntax error or contains a reference an unrecognized field or function name"
The function works fine when called from a subroutine in VBA.
How do you call a custom VBA function from a field formula?