I have a C++ application that runs on one installation of QNX4 but fails on a more recent installation with what appears
 to be a failure to open 3 pipes used to pass messages between the two threads of the application.  The pipe executable 
(daemon?) is running in both cases.  As far as I can tell the sysinit.1 scripts are functionally identical as well as 
the environments and the directory structures.  I don't know what else could prevent the pipes from being created.  Any 
ideas?