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SUBROUTINE GOPEN (FILE,BUFFER,OPTION)
C
INTEGER FILE,OPTION,ERR,OUTREW,OUTNOR
REAL BUFFER(1),SUBNAM(2),HEADER(2)
DATA SUBNAM / 4H GOP,4HEN /
DATA OUTREW,INPNOR,OUTNOR / 1,2,3 /
C
CALL OPEN (*200,FILE,BUFFER,OPTION)
IF (OPTION.EQ.INPNOR .OR. OPTION.EQ.OUTNOR) GO TO 150
IF (OPTION.EQ.OUTREW) GO TO 110
CALL READ (*201,*202,FILE,HEADER,2,1,ERR)
GO TO 150
110 CALL FNAME (FILE,HEADER)
CALL WRITE (FILE,HEADER,2,1)
150 RETURN
C
200 ERR = -1
GO TO 210
201 ERR = -2
GO TO 210
202 ERR = -3
210 CALL MESAGE (ERR,FILE,SUBNAM)
C
RETURN
END
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