Server Crashes when a custom ragdoll spazzes out (TTT)

I have a TTT server and I have custom player models installed on the server, problem is that every so often when the custom player models die they spaz the fuck out and the server crashes. I recently ran debug on the server and got the error message but it doesn’t even begin to make sense to me…

The message is this:

Engine error: player/alyx.mdl (2) at -1. -1. -1. in contact with player/alyx.mdl (2) at -1. -1. -1., crash. dist = -1, minq = 99999999999999998000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000

Worst part is, that its not the alyx.mdl that is spazzing out its a Solid Snake, Hatsune Miku pretty much any of the non-HL2/CS models

If anyone could shed some light on this I would love you forever

This is happening with CS:S and HL2 models as well.
Someone posted a solution at the end of this thread:

[editline]22nd May 2013[/editline]

I just noticed he updated it; there is no sure fire solution yet, unfortunately. You could try Ambro’s method to reduce crashing, however.

Many thanks I will try this out and see if it works