stockVariable + intercept

[vbartolino]

It is clear that a stockVariable can be used in place of a parameter approx. as follows:
#param ~ #multi * stkVar

What it is not clear to me is if and how I could implement something like this instead:
#param ~ #param1 + #multi * stkVar

I've tried without success
(+ #param1 stkVarFileName)

I have few situations where this could be rather useful.
As always thankful

[bthe]

I still haven't seen a working version of a Gadget model with stockvariables, have you managed to get this working?