[stupok]

Google is your friend.

First result:

Q: My game crashed with this error message: "S_Findname: Out of sfx_t" A: When Half-Life reaches 512 cached sounds it causes the engine to stop. On dedicated servers, you can rejoin after the crash, but if you are hosting a non-dedicated server it will dump all the clients. If maps are designed correctly, this crash should never occur... the problem is that the number of monster types used in a map needs to be kept low. The other problem is that a few maps do use too many sounds (it's hard to judge, I admit).