Program pointer line number export

That is very likely impossible. You could use TriggL/J IO to send out numbers or use something like path segments, though.

Have seen this question frequently, and every time I see it, I'm wondering why someone wants the line number on the plc. For me that doesn't make sense at all.

I had pretty much the same thought. It seems like a controls programmer who wants absolute control maybe.

In that case the line number is not enough, you also need the module name, except you have only one module, but then I doubt on the programming skills.

No, I don't. Never thought about, and don't want to, Doesn't make sense at all or me.

Check this thread in the RobotStudio forum. Maybe it is helpful for you.

EDIT: Sorry I didn't see that you want to monitor it constantly.