Line numbers are a part of the IDE so it depends on which IDE you're using. Going by your second question I believe you're using MicroCodeStudio but I'm not sure it has that feature though you can see which line the cursor is on at the bottom of the screen. I don't have MCS on this machine so I can't be of more assistance than that I'm afraid.

It sounds as if you're hitting the ICD Compile button instead of the normal Compile button. Make sure you're clicking the correct one...

/Henrik.