Same stream given more than once in PUT/OUTPUT-TO action.

#7900 Run-time warning

Same stream given more than once in PUT/OUTPUT-TO action.

Additional Information

For stream 'X'.

Explanation

A stream may only be specified once in a list of streams. The following is not allowed because stream foo is already active:

  ELEMENT a                ; <!element a - - (b)*>
    PUT foo "%c"
  
  ELEMENT b
    PUT (#OUTPUT AND foo) "%c"