Reg: Display of variable added in one Instance across other instances

It is not possible to templetize ruleset or function parameters. If you need to be able to send a variable number of "parameters" or data points to a ruleset, use an array or a Class template (from which you can create an instance). That way you create a request object that can be extended, instead of trying to create an extensible parameter list.

"parm1 not in scope" probably means that you are trying to reference parm1 from a place where it is not visible, i.e. normal scope visibility rules for variables/parameters apply.

I do not understand the formulation "We have defined one parameter in ruleset as "parm1" which is further being used to place the identity of variable defined through variable template". What are you trying to accomplish?

Are you trying to select a variable to send to the ruleset as a parameter? Are you trying to select a variable name to send to the ruleset as a parameter (and if you are, to what end?)?

Regards,

Jostein