Model Sim "Invalid time string specified" Error

I found another post from a third party that they have similar issue and resolved it by deleting the register key.

Could you try their method and see if it helps.

***Please make a backup by Export to .reg file, before deleting. As making incorrect changes to the Registry may cause issues to Windows and may cause programs crashing or no longer start***

This is their solution. (not tested and might be risky)

Press "Windows+R" to open the run window, enter 'regedit', find the path HKEY_CURRENT_USERS\Software\ModelTechnology Incorpporated\Modelsim, and delete all the folders.

I suspect something is wrong with your machine, do you see the same issue using a difference machine/PC?

At the same time, try below troubleshooting steps:

- If you are running antivirus software, try to temporarily disable the antivirus software during the Questa software download and installation process.

-Install the software with Administrator privileges.

- Try to download and auto install using the new Quartus installer.

- Check your OS history update, e.g. to check if the issue happen after some specific Window update.

Regards,

Richard Tan