Intel FPGA Edition SIM ERROR vopt-14408

May I know which Quartus version and the Questa version that you are using?

I found from here that:

https://docplayer.net/219167054-Questa-intel-fpga-edition-quick-start.html

"This error is issued when the design capacity for Questa-Intel FPGA Edition simulator is exceeded. By default, the simulator does not preserve signals for waveform viewing.... Preserve signals explicitly by specifying vsim or vopt options, such as +acc. "

Not sure if this works for you. If the solution does not work, please help to share me the Quartus design .qar project file (Project> Achieve Project) so I can investigate on this issue.

Best Regards,

Richard Tan

p/s: If any answer from the community or Intel Support are helpful, please feel free to give best answer or rate 4/5 survey.