Additional considerations for using EXECUTIL

All of the EXECUTIL operands are mutually exclusive, that is, you can only specify one of the operands on the command.
The HI, HT, RT, TS, and TE operands on the EXECUTIL command are also, by themselves, immediate commands. Immediate commands are commands that can be issued from the terminal if an exec is executing and you press the attention interrupt key and enter attention mode. These commands are processed immediately. z/OS TSO/E REXX Reference, describes the immediate commands.
In general, EXECUTIL works on a language processor environment basis. That is, EXECUTIL only affects the current environment in which EXECUTIL is issued. For example, if you are in split screen in ISPF and issue EXECUTIL TS from the second ISPF screen to start tracing, only execs that are invoked from that ISPF screen are traced. If you invoke an exec from the first ISPF screen, the exec is not traced.
Using the EXECDD and SEARCHDD operands may affect subsequent language processor environments that are created. z/OS TSO/E REXX Reference, describes the concept of language processor environments and how EXECUTIL EXECDD and EXECUTIL SEARCHDD may affect more than one environment.