Rexx programs can call other Rexx programs as external
functions or subroutines with the
CALL instruction.
If a program is called with the
CALL instruction, the program runs in the same
process as the calling program.
If you call another program by a Rexx command, the program is executed in
a new process and therefore does not share .environment, .local,
or the Windows or Unix-like systems shell environment.
Example 1.43. Calling other Rexx scripts
call"other.REX"/* runs in the same process */"rexx other.REX"/* runs in a new child process */"start rexx other.REX"/* runs in a new detached process */
When Rexx programs call other Rexx programs as commands, the return code
of the command is the exit value of the called program provided that this
value is a whole number in the range -32768 to 32767. Otherwise, the exit
value is ignored and the called program is given a return code of 0.
