Hi problem with raiserror

select 1

no problem ouput will come 1

If i write like below

select 1

--raiserror

Msg 121, Level 20, State 0, Line 0

A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The semaphore timeout period has expired.)

it show this message. if commented of RAISERROR