[Pierre-Marie Baty]

SZ_GetSpace messages usually happen when the server is required to send too much data over the network in one frame. This happens especially when clients connect/disconnect and when the game DLL (or a plugin) queues up many "reliable" datagrams to be sent to him. Datagrams (i.e. network packets) with the "reliable" bit set are datagrams the server should NOT drop, even if it means huge slowdown in the game ; if it occurs, the game terminates and a SZ_GetSpace message is sent.

Plugins that are very fond of sending all this coloured and glowing text to be displayed on the client's screen are also the most prone to make a server crash. Hence I don't think the HPB_bot is involved here ; rather, I would take a look around AMX or AdminMod (or whatever else you have).