en/disable SqlPlus HOST command?

Hi,

one of my scripts generates several log files via SPOOL. At the end of the process, all of these are combined via

host copy log1.tmp+log2.tmp+log3.tmp all.log

Unfortunately, on some customers systems that "copy" works, and on some it doesn't. Oracles SQLPlus handbooks state that availability of this command can be configured by the DBA, but searching the online help for "host" doesn't help much :)

How do i check if "host" will work, and enable it (with DBA rights) if necessary?

-- 
                                              Andreas
Mach's mit  /-\
            |o|
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