A REFERENT written to a STRING SINK coroutine must come from an inner NESTED-REFERENTS scope.
#6141 Run-time catchable error
A REFERENT written to a STRING SINK coroutine must come from an inner NESTED-REFERENTS scope.
Explanation
Every coroutine in OmniMark is scoped, and has to finish
execution by the end of its scope. Every referent written into
a string sink coroutine therefore has to be resolved
before the end of the coroutine scope, otherwise the coroutine
execution would be blocked. OmniMark enforces this restriction by requiring
the using nested referents scope around every referent written
into the string sink coroutine.