On Linux (?all non-Windows platforms?) attempting to run an isolate with child devt interpreters generate a FUTURE ERROR: 1119:

[dyaandys]

[This was originally mantis 18200]

Linux 64 Unicode 21.0.53126 (although originally reported in 19.0)

  )load isolate
  #.isolate.Config'runtime' 0

1
#.isolate.Config'onerror' 'debug'
signal
iso←#.isolate.New ''
iso.÷ 0
FUTURE ERROR: 1119:
iso.÷0
∧

Secondly what is error 1119 and how am I meant to know where to go looking for it ?

[dyaandys]

Regarding where to go looking for what error 1119 means, @mkromberg said to @dyaandys
"It's in the document that explains parallel programming
Although it may not say much about 1119, which is a Conga error, I suspect
I think the document now talks about RIDE, but I cannot say for sure."

@mkromberg added: "Point it [this issue] at me"