Do these missile's that stop disappear, or are they still there, just stopped? If they disappear it may be because the missle has entered phase space, which they are supposed to do then re-appear inside the shields of the target vessel. If on the other hand they just stop and stay put in the 1 position for some time, it may indicate that there is some lag in the program process's and a graphic's performance setting may need to be reduced. Other indicators that this is happening may be a stutter with the frame rate, ships that have been destroyed may still appear to be there, and or miss there exploding effects.

Since the Dev.exe is not picking anything up, indicates, to me anyhow, that it is the graphic's setting. Just as a couple of things to try to perhaps help narrow it down;

If you arn't running on lowest graphic settings, try lowering them and see if that fix's it. If you still have the problem it  may be that phase missiles are quite demanding on memory and having all those extra phase missles is causing it.

Another thing to take note of may be that the missle's target is being destroyed after the missle has been fired, but before it can hit the target, leaving the missile in limbo.

Yeah you wouldn't think so. I have had a ship shotting 12 phase missles, from only 1 weapon type set mind you, and I don't experience any problems. I'm really at a loss as to what your problem may be. Maybee there is something wrong with the MissileTravelEffect data within the weapon, but you would think that the Dev.exe would pick it up, and that dosn't explain why its only happen to some of them some of the time.

If I was a betting man, I would say it was something simple like a conflict with the weapon count or something like that, but really its quite impossible to know without having looked through the file's and comparing them.

Anyhow I wish you luck with figuring it out.

Hmm, when you added the phase missile data to the other 2 weapons did you copy and paste the info from the original. I'm just wondering because I have had problem somewhat like this before from doing this. What I had forgot to do was change the DamagePerBank:FRONT 168.000000 on weapon2 to DamagePerBank: LEFT & RIGHT. Since Weapon2 only has hardpoints that face left & right. Weapon0 only has points that face forward.