Error 5 using new monitors

[David Deacon]

We are using PowerBasic 3.5 for dos and have written
several programs to display graphs using the screen 12
function.

Recently we changed the monitor on one of these computers
to a new Compaq s510 monitor. When we tried to run the
same program on the same computer we started getting
Error 5, Illegal function call when executing the
screen 12 function.

What is causing this when all we did is change the monitor?

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[Michael Mattias]

You get error 5 on 'SCREEN n' if monitor does not support mode 'n'.

But I don't know if that's a function of the monitor, video card or some combination thereof.

All I know is when that happened to me, I picked another mode and it worked fine.

MCM