Running the Fortran Ide

I enter code I compile and run that code The code executes ok

I make changes to that code Atempt to compile and run Get the message: the last build process is still running

What am I doing wrong? What should I do?

This may help. https://www.youtube.com/watch?v=7P8vPlCPxuk

When the program runs, it appears in a Command Prompt window.

When it has finnished running, make sure that you close this window before doing anything else.