RE: Q: Can anyone explain this curious behaviour.

Hi,

again thanks for the replies to this thread.

The original OP was not about "Unix/VMS error/exit codes", it was about 
the unexpected %SYSTEM-F-NOLOGNAM. The explanation given triggered
some tests and examples shown for Linux and VMS, which included the exit 
codes.

 From a perl viewpoint, I just expect one perl script to print the very 
same output no matter where it runs, especially as there is no OS 
specific code in the script.

As far as I understand, %ENV is or behaves like a perl hash. That is, 
'defined $ENV{X}' can be false and that is expected. But looking up a 
hash value should not cause any side effect. On VMS it does, so from my 
point of view the implementation of %ENV on VMS is incomplete, incorrect 
or broken.


John