Date:         Thu, 4 Sep 2008 09:54:33 -0400
Reply-To:     Nagakumar_Sridhar@BD.COM
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Kumar Sridhar <Nagakumar_Sridhar@BD.COM>
Subject:      Can not decipher this..
Content-Type: text/plain; charset="US-ASCII"

Hey All:

        Can some one please tell me what is wrong with this piece of code:

data dm(drop=servtim servdate);
        format servdate worddate.;
        set dm;
        by csubject csrvrtm cuserid cstatus crevisn caction;

        servdate=datepart(csrvrtm);
        servtim=timepart(csrvrtm);
        dateonly=servdate;
        if ((servtim-lag(servtim) < 3600) and (dateonly=lag(dateonly)))
then flag="X";
        if flag='X' then lag(flag)=flag /* THIS IS WHERE I AM TRYING TO
PUT AN "X" TO THE PREVIOUS OBSERVATION ALSO */;
run;


I am getting the following error in my log:

3156  data dm(drop=servtim servdate);
3157      format servdate worddate.;
3158      set dm;
3159      by csubject csrvrtm cuserid cstatus crevisn caction;
3160
3161      servdate=datepart(csrvrtm);
3162      servtim=timepart(csrvrtm);
3163      dateonly=servdate;
3164      if ((servtim-lag(servtim) < 3600) and (dateonly=lag(dateonly)))
then flag="X";
3165      if flag='X' then lag(flag)=flag;
ERROR: Undeclared array referenced: lag.
ERROR: Variable lag has not been declared as an array.
3166
3167  run;

NOTE: The SAS System stopped processing this step because of errors.
WARNING: The data set WORK.DM may be incomplete.  When this step was
stopped there were 0
         observations and 8 variables.
WARNING: Data set WORK.DM was not replaced because this step was stopped.
NOTE: DATA statement used (Total process time):
      real time           0.01 seconds
      cpu time            0.01 seconds

TIA

Kumar

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