Error message: Variable POSITION not found

[TaeYi]

PROC IMPORT OUT= employees DATAFILE=
""
DBMS=xlsx REPLACE;
GETNAMES=YES;
RUN;
PROC PRINT DATA= employees;
RUN;


PROC TABULATE DATA= employees;
CLASS position;
TABLE position ALL;
RUN;

DATA employees;
SET employees;
IF endDate =. THEN endDate = TODAY();
RUN;

DATA truckers;
SET employees;
IF JOB ne 'Truck Driver' THEN DELETE;
RUN;

DATA truckers;
SET employees;
yearsOfService=INT(YRDIF(hireDate,endDate));
RUN;

PROC PRINT DATA=truckers;
RUN;

ODS EXCEL 
FILE=""

OPTIONS(sheet_interval='table');
PROC FREQ DATA=truckers;
TABLE yearsOfService;
RUN;

ODS EXCEL CLOSE;

[brzcol]

Hi, would you mind re-posting the three images above your code? We are unable to see them. Also, did your proc import step successfully run to create the table?