Ok,
here is my example.
The subroutine gotox(..,..) shall print a string at position X=X-LEN_TRIM(str).
Unfortunately, I cannot replace the characters "81" by // strhlp(1:LEN_TRIM(strhlp)) // ...
SUBROUTINE GOTOX(X, STR)
!
INTEGER, INTENT(in) :: x
CHARACTER (LEN=*), INTENT(in) :: str...