Sys V Messages

[dbmk1 at stc.co.uk]

System V Uniplus 68000 version as supplied by Root computers.

I'm currently playing around with messages and am having trouble.  
Despite having specified IPC_NOWAIT in the msgrcv call the receiving process
is hanging despite the fact that a message is waiting.
If I direct the receive process to an empty queue then I get error 35 back
as expected.
I'm using msgtyp 0 (next message on queue) for the msgrcv call.

Are there any known funnies/bugs/gotchas in this area or do I assume my usual
level of ignorance is excelling itself this time.

Replies by whatever means you think appropriate.
-- 
Regards
  Derek                   !seismo!mcvax!ukc!stc!dbmk1 

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