Re: I have downloaded ModelSim 19.3 part 1 and part 2 for Windows. When I try to install the following error is displayed
" Error copying from packed archive."
I am not sure if there is Modelsim 19.3 version, do you mean Modelsim for Quartus 19.3 Pro? Anyway I suggest you to re-download (your desired version) it, it might due to the SW is not downloaded completely.
Note: QP Pro 19.3 and 19.4 use same version of Modelsim which is 2019.2/19.2