After that I put the func_instance in the actual map, set the replacable value to a real info_target, but it doesn't seem to work. Typing "ent_bbox trigger_catapult" in-game shows the trigger itself, but there is no line leading to the info_target.

What am I doing wrong?

Kasc wrote:
Try naming your target @ and setting the variable to @ if you haven't already.

Edit disregard this-That kind of defeats the whole purpose of putting this in an instance. By naming it that, you can only have 1 target per map.
I misunderstood what you meant.

I do have it working as you said. I changed the parm in the instance to:
@fling_target > target_destination > target
and in the map named the actual target to "@fling_target3" and set the instance replace to "@fling_target3" and it worked.

Nicely done Kasc.

I had this issue when I tried to close a door outside of an instance from within an instance.

If you have an instance named "closer",

And a door named "close_me",

If you set the $close variable to "close_me", the instance will rename that target to closer-close_me,

where as with @close_me, the instance would still refer to it as @close_me.

Kasc wrote:
If you set the $close variable to "close_me", the instance will rename that target to closer-close_me,

where as with @close_me, the instance would still refer to it as @close_me.

This was the part which I wasn't aware of. Now it works like a dream. Thank you!