Plato Step Into

Currently have a very large fixed field, Fortran program which I am debugging. When I first started to use SilverFrost Fortran and Plato3, vers 4.1, the system allowed me to 'step into' or 'step over'. However, now it only allows me to 'run to error' and stops. Try as I may, I cannot get the Plato3 system to honor the 'step into' and 'step over' commands. What is happening? Please advise, Sid kraft 😄 .

I have done a simple test and I can both 'step into' and 'step over' and I can do this either directly from the editor (Plato) or from the instance of SDBG that is fired up by Plato when you start debugging.

If you have the correct debugging options set and the problem persists, try running SDBG as a separate application to see if this fixes the problem.