Invalid use of #OUTPUT in current stream group encountered.
#2084 Compile-time error
Invalid use of #OUTPUT in current stream group encountered.
Additional Information
The #OUTPUT stream may appear at most once in a group of
streams, but the current 'X' action contains several.
where X is output-to or put.
Recovery
Compilation continues but no compiled source code file will be saved.
Explanation
The special stream name #output refers to whatever streams
are currently active. The order in which streams are entered in a
put or output-to action does not matter, but it is an
error to enter a specific stream more than once in a given group.