IDS file Class: MAGE_ALL broken?

[Fantasy]

I’ve been trying to make a spell that only works against magic users, but that’s easier said than done. To identify the target I’m using effect 177 (Use EFF File) in combination with the IDS File 5 (Classes).

 

Now I’ve managed to get it to work by using the code for pure mages (as in single class or kits). Unfortunately the “202 MAGE_ALL†option does absolutely nothing, which is too bad because I want the spell to be effective against mages, sorcerers, dual-class and multi-class mages.

 

Could it be that this identification code is broken, or is it working and am I just doing something wrong?

 

Thanks in advance.