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dbm-command file_operation

Hi MaxDB collegues,

does anybody know how one can use


in dbmcli so that it actually works?

As of [MaxDB Doku|] it should be as easy as

file_operation BACKHIST OP=SHRINK LINES=10

to chop down the backuphistory to the most recent ten lines.

Unfortunately all I get (on 7.6.03 B15) is:


-24996,ERR_PARAM: wrong parameters


dbmcli on db760>file_operation BACKHIST OP=DELETE


-24996,ERR_PARAM: wrong parameters

Any idea anybody?

Thanks and KR Lars

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  • Best Answer
    Posted on Jan 30, 2008 at 02:42 PM

    Hi Lars,

    well, the thing is, the dbm command file_operation is only possible on very specific files (which our documentation doesn't reflect). Those files would be any files starting with atp or lc or any of the dba files in the DBAHIST subdirectory of the Rundirectory.

    So it cannot be used for the usual analysis files like knldiag.err, dbm.knl or similar. I agree that the error message delivered by DBM is rather misleading.



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  • author's profile photo Former Member
    Former Member
    Posted on Jan 30, 2008 at 02:39 PM

    Hi Lars,

    it seems that there is a small error in your statement.

    Please try

    file_operation BACKHIST OP=SHRINK LINE=10

    The help shows LINE as an option, not LINES.

    Good luck


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