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The retail version of this SEXP doesn't work, period. Running a mission with an is-iff call will crash retail FS2 every time. -- BlueFlames 16:46, 31 July 2007 (CDT)

Works for me. Just made a test mission in retail FRED2, using is-iff, and played it no problems in retail FS2. Are you sure you didn't make your test mission in Fred2_open instead of retail FRED? Shade 17:01, 31 July 2007 (CDT)

Last time I tested it, there wasn't a FRED2_Open to get confused with. Since then, I've been in the habit of checking if an event to change a ship's IFF had come true, instead of directly checking the ship's IFF. Anyway, it could just be a bug in a specific usage of is-iff that I thought was a general bug with the operator. -- BlueFlames 18:23, 31 July 2007 (CDT)

I remember playing a mission in FS1 that used is-iff and there were no problems. - Supernova 11:26, 1 August 2007 (EST)

I remember that is-iff crashed every single time I used it, in both FS1 and FS2. It's been fixed in FSO, but we never found the original cause of it. We just ended up rewriting it. Goober5000 20:56, 7 August 2007 (CDT)