Dyalog 17.1 and earlier on Raspberry Pi OS Buster

[AndyS|Dyalog]

Dyalog 17.1 and earlier should run on Raspberry Pi OS Buster. However, if you see the following error when starting Dyalog
/opt/mdyalog/17.1/32/unicode/dyalog: error while loading shared libraries: libncurses.so.5: cannot open shared object file: No such file or directory

then you will need to install libncurses5, which you can do with the following command:
sudo apt install libncurses5