One of the ways to retrieve the OS/400 version, release & modification level is shown below:
The CL Program retrieves the OS/400 version & release. The Front end CMD may be used, if needed.
Use either "CALL DSPSYSLVLC" or the command "DSPSYSLVL" as required.
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Pgm Name: DSPSYSLVLC (Type-CLP)
Purpose : C.P.P For Cmd-DSPSYSLVL
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Pgm
Dcl &SYSLVL *Char 9
RtvObjD QSYS/QCMD *PGM SYSLVL(&SYSLVL)
SndPgmMsg MSG('System Level ... ' *CAT &SYSLVL) MsgType(*COMP)
EndPgm
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Cmd Name: DSPSYSLVL (Type-CMD)
Purpose : Command To Retrieve System Lvl
(Corr. C.P.P is DSPSYSLVLC)
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CMD Prompt('Display System Level')
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This was first published in September 2001