Simulation FAILED due to netlist linker error(s).

hello guys any help please its my final years project
ISIS Release 8.10.03 (Build 29560) (C) Labcenter Electronics 1990- 2020.
Compiling design 'C:\Users\Triple Treat\Desktop\semester project.pdsprj'.
Netlist compilation completed OK.
Cannot find model file 'POT_LIN.MDF'.
Pin '3' is not modelled. [RV2]
Pin '2' is not modelled. [RV2]
Pin '3' is not modelled. [RV3]
Pin '2' is not modelled. [RV3]
Pin '3' is not modelled. [RV4]
Pin '2' is not modelled. [RV4]
Pin '2' is not modelled. [RV5]
Pin '3' is not modelled. [RV5]
Pin '1' is not modelled. [RV1]
Pin '2' is not modelled. [RV1]
Pin '3' is not modelled. [RV1]
Pin '1' is not modelled. [RV2]
Pin '1' is not modelled. [RV3]
Pin '1' is not modelled. [RV4]
Pin '3' is not modelled. [RV6]
Pin '2' is not modelled. [RV6]
Pin '1' is not modelled. [RV6]
Pin '1' is not modelled. [RV5]
Simulation FAILED due to netlist linker error(s).

I couldnt find that any help??