What do you want to render?
message_begin( MSG_ONE, SVC_TEMPENTITY,origin[idt],id)
=> this starts a tempentity message. Then you have to use the write_* functions to specify the type and the parameters. You don't specify a type so you get the error
All types and parameters are listed in the Multiplayer Source/common/const.h file in the HLSdk.
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