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

Additional Information

For stream 'X'.

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                ; 
  PUT foo "%c"

ELEMENT b
  PUT (#OUTPUT AND foo) "%c"

[ INDEX ] [ CONCEPTS ] [ TASKS ] [ SYNTAX ] [ LIBRARIES ] [ LEGACYLIBRARIES ] [ ERRORS ]