[Sandervraun]

Originally Posted by PC Gamer Generally speaking.... If other players are seeing a big red 'Error' it means that they don't have the necessary model/material files on their system. Your server is saying 'display these items' (the model) to the players, and the players are saying 'I don't have those items', so they see an error instead. The fix: Install a method of transferring the files to players when they connect to your server. Example: https://forums.alliedmods.net/showthread.php?p=602270

So I have to do this with all materials, and models. Put them in a text file.