Hello all, i'm a newbie to fortran 90, i believe that there a mistake with my variable er3 declaration but i can't find it. my code is:
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SUBROUTINE BACKWARD(E,Y,p,L,k,pqr,O5,er5,er4,er3)
IMPLICIT NONE
INTEGER , INTENT(IN) :: p,k,L
INTEGER :: i,j,jo...