I get the following error when attempting to execute:

exec sp_trace_create @traceid = @traceidout output,

@options = @myoptions,

@tracefile = @mypath,

@maxfilesize = @mymaxfilesize,

@stoptime = @mystoptime,

@filecount = @mymaxRolloverFiles

Msg 137, Level 15, State 2, Line 1

Must declare the scalar variable "@traceidout".