Re: CL Processing File Members

["Brian Johnson" <brian.johnson.mn@xxxxxxxxx>]

Member sequence for *FIRST and *LAST is not specified in the command
help text.  However, for *FIRSTMBR and *LASTMBR, the sequence is
specified as member-name order.  My guess is *FIRST/*LAST are
first-added and last-added.  If suspect if you modify your routine to
use *LASTMBR to to find your ending member name, *FIRSTMBR to fetch
the first,   and (current-member-name *NEXT) to get the next member,
you will process all members in the file.



On 8/12/07, Robert Munday <RWMunday@xxxxxxxxxxxxx> wrote:
> I am reading some multi-member archive files and deleting any members older
> than six months.
>
> I devised a scheme to RTVMBRD *LAST of the last member to determine when I
> finish, then I read the *FIRST member.  Once I finish with that member, I
> check to see if the current member I am processing is equal to the last
> member.  If it is not, I RTVMBRD *N *NEXT to get the name of the next
> member, then start the process over again.  When the current member equals
> the last member, then I know I have processed the last member in the file...
> or so I thought.  To test this, I copied 1000 members to a test file and ran
> my process to delete each member.  With my current scheme, 15% of the
> members were not deleted.  Logically, if I find the *FIRST and read until I
> get to the *LAST, I should be processing all the members.  I can rerun
> against these remaining members and I eventully get them all.  I need to get
> them all in one pass, not multiple passes.
>
> If I change the CL to RTVMBRD *FIRST, process it, then RTVMBRD *N *NEXT in a
> loop until I error out (run out of members while reading in arrival
> sequence), all members are deleted.
>
> I can delete all of the members in this file by just reading them in arrival
> sequence.  When I read starting with the *FIRST and loop until I finish with
> the *LAST member, my process is incomplete.
>
> Why is that?
>
>
>
> Robert Munday
> Munday Software Consultants
> Montgomery, AL
> on assignment in Nashville, TN
>
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