Unable to run RTL Simulation

Hello, I am trying to do an RTL simulation but I keep getting this error message:

Info: Start Nativelink Simulation process

executing command line: ip-make-simscript --nativelink-mode --output-directory=UxSRADAR_iputf_input --spd=D:/Joes/Projects/Working/UxRADAR/Altera/Complete_Design/UxS_RADAR/pll2.spd --spd=D:/Joes/Projects/Working/UxRADAR/Altera/Complete_Design/UxS_RADAR/pll1.spd --spd=D:/Joes/Projects/Working/UxRADAR/Altera/Complete_Design/UxS_RADAR/pll3.spd

Error: You did not generate the simulation model files or you generated the IP file using an older version of MegaCore which is not supported by RTL NativeLink Simulation

Error: Regenerate the IP and simulation model files using the latest version of MegaCore for RTL NativeLink Simulation flow to function correctly

Error: NativeLink simulation flow was NOT successful

================The following additional information is provided to help identify the cause of error while running nativelink scripts=================

Nativelink TCL script failed with errorCode: NONE

Nativelink TCL script failed with errorInfo: Regenerate the IP and simulation model files using the latest version of MegaCore for RTL NativeLink Simulation flow to function correctly

(procedure "get_ip_info" line 1)

invoked from within

"get_ip_info $full_file_name"

(procedure "run_eda_simulation_tool" line 195)

invoked from within

"run_eda_simulation_tool eda_opts_hash"

I have regenerated the PLLs that I have in my design but keep getting this error message within Quartus after I click the RTL button.

Can anyone help me?

Thanks,

joe