Definitions of Viva calculator data access functions

Hello!

I am using Spectre to run a simulation on a design--it is a standard potential/flow model, but the variables are different. I have been asked to define a new set of data access functions for Viva Calculator, e.g. RT() for the node potential vs. time.

I have found asiDefineDataAccessFunction in the manual, but it seems to only allow the existing defined access functions to be redefined. I tried a little bit of handwaving, where I located the VT function with asiGetDataAccessFunction, and then asiDefined'ed RT to it--it threw no errors, but didn't work in the calculator either.

Also, I have the pipe dream of adding this RT() to the schematic access toolbar in the Viva calculator.

Here's some code, as run in CIW:

> o_tool = asiGetTool('analog)
stdobj@0x165f5d88

> daf = asiGetDataAccessFunction( o_tool 'VT )
asiDataVT

> asiDefineDataAccessFunction( o_tool 'RT 'asiDataVT )
asiDataVT

> daf = asiGetDataAccessFunction( o_tool 'RT )
asiDataVT

However, after I did this, I tried it out in ADE, but it couldn't find RT as an access function.

1) Is what I'm doing possible? asiDefine' seemed to not complain, even though the manual says it shouldn't necessarily work.
2) Is there a tutorial on this somewhere?
3) If it is possible, what am I doing wrong?
4) If it is possible, is it then possible to modify the schematic access toolbar in Calculator to include it, or is this merely all a pipe dream?

Thanks in advance!

--Jeremy