I'm working on a COBOL program and it calls an external module to do a simple calculation. When I run the program it's giving me an error that says my linkage section has a null address and I don't know why
Here is the screen shot of the error Screenshot of Error
Here is the code for the external module
IDENTIFICATION DIVISION.
PROGRAM-ID. Program3Call.
DATA DIVISION.
LINKAGE SECTION.
01 LS-STUDENT-AVERAGE-AREA.
05 COURSE-AVERAGE-1 PIC 9(3).
05 COURSE-AVERAGE-2 PIC 9(3).
05 COURSE-AVERAGE-3 PIC 9(3).
05 COURSE-AVERAGE-4 PIC 9(3).
05 COURSE-AVERAGE-5 PIC 9(3).
05 STUDENT-AVERAGE PIC 9(3).
PROCEDURE DIVISION .
MAIN-PROCEDURE.
100-STUDENT-AVERAGE.
PERFORM 300-CALCULATE-AVERAGE-RTN.
300-CALCULATE-AVERAGE-RTN.
COMPUTE STUDENT-AVERAGE ROUNDED = (COURSE-AVERAGE-1 +
COURSE-AVERAGE-2 + COURSE-AVERAGE-3 + COURSE-AVERAGE-4 +
COURSE-AVERAGE-5) / 5.
GOBACK.
Here is the main program where this module is called:
PROGRAM-ID. Project2 AS "Project2".
ENVIRONMENT DIVISION.
INPUT-OUTPUT SECTION.
FILE-CONTROL.
*****The student input file
SELECT STUDENT-FILE-IN
ASSIGN TO "C:\STUFILE.TXT"
ORGANIZATION IS LINE SEQUENTIAL.
*****The program input file
SELECT PROGRAM-FILE-IN
ASSIGN TO "C:\PROGRAM.TXT"
ORGANIZATION IS LINE SEQUENTIAL.
*****The student report output file
SELECT STUDENT-REPORT-FILE-OUT
ASSIGN TO "C:\REPORT.TXT"
ORGANIZATION IS LINE SEQUENTIAL.
DATA DIVISION.
FILE SECTION.
*Student input file
FD STUDENT-FILE-IN.
01 STUDENT-RECORD.
05 STUDENT-NUMBER PIC 9(6).
05 TUITION-OWED-IN PIC 9(4)V99.
05 STUDENT-NAME-IN PIC X(40).
05 PROGRAM-OF-STUDY PIC X(5).
05 COURSE-CODE-1 PIC X(7).
05 COURSE-AVERAGE-1 PIC 9(3).
05 COURSE-CODE-2 PIC X(7).
05 COURSE-AVERAGE-2 PIC 9(3).
05 COURSE-CODE-3 PIC X(7).
05 COURSE-AVERAGE-3 PIC 9(3).
05 COURSE-CODE-4 PIC X(7).
05 COURSE-AVERAGE-4 PIC 9(3).
05 COURSE-CODE-5 PIC X(7).
05 COURSE-AVERAGE-5 PIC 9(3).
*Program input file
FD PROGRAM-FILE-IN.
01 PROGRAM-RECORD-IN.
05 PROGRAM-CODE-IN PIC X(5).
05 PROGRAM-NAME-IN PIC X(20).
*Student report output file
FD STUDENT-REPORT-FILE-OUT.
01 STUDENT-REPORT-RECORD-OUT PIC x(90).
WORKING-STORAGE SECTION.
*Table to hold program records
01 PROGRAM-RECORD.
05 PROGRAM-TABLE.
10 PROGRAM-CODE PIC X(5) OCCURS 20 TIMES.
10 PROGRAM-NAME PIC X(20) OCCURS 20 TIMES.
*The student report record
01 STUDENT-REPORT-RECORD.
05 STUDENT-NAME PIC X(40).
05 FILLER PIC X(2) VALUE SPACES.
05 PROGRAM-NAME-OUT PIC X(20).
05 FILLER PIC X(4) VALUE SPACES.
05 TUITION-OWED PIC Z,ZZ9.99.
*A line to make the output look good
01 HEADER-LINE.
05 FILLER PIC X(90) VALUE ALL "-".
*The column header
01 COLUMN-HEADER.
05 NAME-COLUMN PIC X(42) VALUE "NAME".
05 AVG-COLUMN PIC X(7) VALUE "AVE".
05 PROG-COLUMN PIC X(24) VALUE "PROGRAM NAME".
05 OWED-COLUMN PIC X(12) VALUE "TUITION OWED".
01 CONTROL-FIELDS.
05 STUFILE-EOF-FLAG PIC A(3).
05 PROG-EOF-FLAG PIC A(3).
05 PROG-SUB PIC 9(2).
05 FOUND-PROG-FLAG PIC A(3).
01 COUNTERS.
05 STUDENT-RECORDS-READ-CTR PIC 9(3).
05 STUDENT-REPORTS-WRITTEN-CTR PIC 9(3).
01 WW-SEND-AREA.
05 STUDENT-AVERAGE PIC 9(3).
01 WW-SUB-PROG PIC X(75)
VALUE 'C:\Users\Desiree\bin\Program3Call'.
PROCEDURE DIVISION.
PERFORM 200-INITIALIZATION-RTN.
*Read and process all student records
PERFORM 200-PROCESS-STUDENT-RECORD-RTN
UNTIL STUFILE-EOF-FLAG = "YES".
PERFORM 200-FINISH-RTN.
STOP RUN.
200-INITIALIZATION-RTN.
PERFORM 300-OPEN-FILES-RTN.
*****Load all program records into the table
PERFORM 300-LOAD-PROGRAM-TABLE-RTN
VARYING PROG-SUB FROM 1 BY 1
UNTIL PROG-SUB > 20 OR PROG-EOF-FLAG = "YES".
PERFORM 300-INITIALIZE-REPORT-FILE-RTN.
PERFORM 300-INITIALIZE-COUNTERS-RTN.
200-PROCESS-STUDENT-RECORD-RTN.
PERFORM 300-READ-STUDENT-RECORD-RTN.
IF STUFILE-EOF-FLAG NOT EQUALS "YES"
*********Get the program name
PERFORM 300-GET-PROGRAM-NAME-RTN
VARYING PROG-SUB FROM 1 BY 1 UNTIL
FOUND-PROG-FLAG = "YES" OR PROG-SUB > 20
PERFORM 300-GET-STUDENT-AVERAGE
PERFORM 300-PRINT-STUDENT-REPORT-RTN
END-IF.
200-FINISH-RTN.
PERFORM 300-PRINT-COUNTERS-RTN.
PERFORM 300-CLOSE-FILES-RTN.
300-OPEN-FILES-RTN.
OPEN INPUT STUDENT-FILE-IN.
OPEN INPUT PROGRAM-FILE-IN.
OPEN OUTPUT STUDENT-REPORT-FILE-OUT.
300-LOAD-PROGRAM-TABLE-RTN.
READ PROGRAM-FILE-IN
AT END MOVE "YES" TO PROG-EOF-FLAG
NOT AT END MOVE PROGRAM-CODE-IN TO PROGRAM-CODE (PROG-SUB)
MOVE PROGRAM-NAME-IN TO PROGRAM-NAME (PROG-SUB).
300-INITIALIZE-REPORT-FILE-RTN.
MOVE COLUMN-HEADER TO STUDENT-REPORT-RECORD-OUT.
WRITE STUDENT-REPORT-RECORD-OUT.
MOVE HEADER-LINE TO STUDENT-REPORT-RECORD-OUT.
WRITE STUDENT-REPORT-RECORD-OUT.
300-INITIALIZE-COUNTERS-RTN.
MOVE 0 TO STUDENT-RECORDS-READ-CTR.
MOVE 0 TO STUDENT-REPORTS-WRITTEN-CTR.
300-READ-STUDENT-RECORD-RTN.
READ STUDENT-FILE-IN
AT END MOVE "YES" TO STUFILE-EOF-FLAG
NOT AT END ADD 1 TO STUDENT-RECORDS-READ-CTR.
300-GET-PROGRAM-NAME-RTN.
IF PROGRAM-CODE (PROG-SUB) = PROGRAM-OF-STUDY
MOVE PROGRAM-NAME (PROG-SUB) TO PROGRAM-NAME-OUT
MOVE "YES" TO FOUND-PROG-FLAG
END-IF.
300-GET-STUDENT-AVERAGE.
CALL WW-SUB-PROG USING WW-SEND-AREA.
300-PRINT-STUDENT-REPORT-RTN.
MOVE "NO" TO FOUND-PROG-FLAG.
MOVE STUDENT-NAME-IN TO STUDENT-NAME.
MOVE TUITION-OWED-IN TO TUITION-OWED.
MOVE STUDENT-REPORT-RECORD TO STUDENT-REPORT-RECORD-OUT.
WRITE STUDENT-REPORT-RECORD-OUT.
ADD 1 TO STUDENT-REPORTS-WRITTEN-CTR.
300-PRINT-COUNTERS-RTN.
DISPLAY "Student records read: ", STUDENT-RECORDS-READ-CTR.
DISPLAY "Student reports written: ",
STUDENT-REPORTS-WRITTEN-CTR.
300-CLOSE-FILES-RTN.
CLOSE STUDENT-FILE-IN, PROGRAM-FILE-IN
STUDENT-REPORT-FILE-OUT.
END PROGRAM Project2.
