Trouble using pPar with Spectre simulation

Hi everyone,

I'm fairly new to Cadence so I'm sorry if this is easily solvable.
I am trying to generate a symbol with a variable parameter. For instance, I have an inverter with the NMOS width set to : pPar("width") and the PMOS width set to: 2*pPar("width").

I have gone through the CDF window to edit the parameter using the base CDF layer. (See picture for reference)

Here is the schematic of my simple design:

And here is the schematic using the instantiated inverter as a symbol:

When I try to run a simple simulation using Spectre, I get the following error:

I am wondering what I am doing wrong.

Edit: All schematic have been compiled and checked by the Virtuoso schematic editor with no errors or warnings.

Thank you very much for your help,

Alexandre Boyer