To explicitly invoke the ATBTRACE exec, enter the EXEC command followed by the name of the data set that contains the exec, SYS1.SBLSCLI0, followed by parameters enclosed in single quotes and the keyword "exec". For example:

• To start API tracing, specifying a fully qualified data set name for the trace data set, enter on the command line:

  EXEC 'SYS1.SBLSCLI0(atbtrace)'

     'start dataset(''userx.trace.data'') lu(lux) tp(tpx) userid(userx)' exec

  Note that you must enclose a fully qualified trace data set name within two pairs of single quotes.
• To start API tracing, specifying an unqualified data set name, enter on the command line:

  EXEC 'SYS1.SBLSCLI0(atbtrace)'

     'start dataset(trace.data) lu(lux) tp(tpx) userid(userx)' exec

  The trace data set name will be prefixed with a high-level qualifier that is the user ID of the invoker of the ATBTRACE exec.