A disallowed operation on a default stream was attempted.
#6018 Run-time catchable error
A disallowed operation on a default stream was attempted.
Additional Information
The 'T' action cannot be applied to
stream 'X'.
where T is the action performed on the stream and X is the name of the
stream.
Explanation
This error occurs when an attempt is made to modify a stream that is
not modifiable.