When KAP detects syntax errors, it simply copies the input program unit to the transformed code file with no attempt to optimize the code.
When a program has syntax errors, messages are presented in the
source (/listoptions=o ) listing, interspersed with the
user's code. Regardless of whether an original listing is requested,
stderr: notes syntax errors and warnings. To locate the
error messages in the source listing, look for lines beginning with
the symbols ### , for example:
Footnotes Actions DO Loops Line
1 SUBROUTINE Z(A, B, N)
2 REAL A(N,N), B(N,N)
+--------3 DO 20 I=1,N
!+-------4 DO 20 J=1,N
!! 5 X = A(I,J)
!! 6 Y = B(I,J)
!!_______7 20 C(I,J) = X + Y
### line(7)
### error %KAP-E-DO_NON_EXE, DO loop ends on a non-executable statement.
### error %KAP-E-STMT_FUNCTION_O, Array not declared or statement
function declared after executable statements.
8 PRINT *, X
9 RETURN
10 END
KAP also may intersperse syntax warning messages with the user's code, but optimization proceeds. Syntax warnings are for constructs that are not legal, but whose intent is clear.