Error: BY variables are not properly sorted on data set

[guest1994]

ERROR: BY variables are not properly sorted on data set WORK.SORTEDTRAFFIC.
ParkName=Assateague Island NS ParkType=National Seashore Location=TRAFFIC COUNT AT FWS ENTRANCE
Count=407,276 FIRST.ParkType=1 LAST.ParkType=0 TypeCount=368,677 _ERROR_=1 _N_=5
NOTE: The SAS System stopped processing this step because of errors.
NOTE: There were 6 observations read from the data set WORK.SORTEDTRAFFIC.
WARNING: The data set WORK.TYPETRAFFIC may be incomplete.  When this step was stopped there 
         were 4 observations and 2 variables.
NOTE: Compressing data set WORK.TYPETRAFFIC increased size by 100.00 percent. 
      Compressed is 2 pages; un-compressed would require 1 pages.
WARNING: Data set WORK.TYPETRAFFIC was not replaced because this step was stopped.
NOTE: DATA statement used (Total process time):
      real time           0.01 seconds

Hi,

I'm unable to find a solution for this code below; I'm receiving an error message in the log, 'ERROR: BY variables are not properly sorted on data set WORK.SORTEDTRAFFIC'. Why is this the case and what is wrong?

Many Thanks,

title Generating an Accumulating Column within Groups;

proc sort data=pg2.np_yearlyTraffic 

out=sortedTraffic(keep=ParkType ParkName Location Count);

*Insert BY statement;

by ParkName ParkType;

run;

 

data TypeTraffic;

set sortedTraffic;

by ParkType;

if first.ParkType=1 then TypeCount = 0;

TypeCount+Count;

format TypeCount comma12.;

keep ParkType TypeCount;

run;

[gamotte · Accepted solution]

Hello,

You sort your dataset by Parkname then ParkType. You thus have to use

by ParkName ParkType;