That spellpack seems pretty old. It uses H2I and probably some other older functions that no longer work in 1.24.
Edit: Here's a vJASS, MUI version of Wave Form. It's based off of Carrion Swarm so that you can't target non-pathable regions for your spell casts. You'll need both the WaveForm trigger and the KT trigger.
Edit: Here's a vJASS, MUI version of Wave Form. It's based off of Carrion Swarm so that you can't target non-pathable regions for your spell casts. You'll need both the WaveForm trigger and the KT trigger.