Hello,
J work on a HP.
I want to create message queue by using mq_open with this parameters:
mq_open(p,O_CREAT|O_WRONLY|O_EXCL|0_NONBLOCK,0600,&queue_attr)
with p char [][]
and the function returns the value -1 and errno equal 2.
can you help me ?
Thank.

I would try:

char p[] = "/foo";

The man page says it must begin with a slash character.

Thanks for yours answers.
I try to add a slash at the beginning of my queue name but the resut is the same.
The code I use works on a LInux but it doesn't work on the HP it is the reason I use the HP forum and not the C forum. I think it 's a problem with the HP maybe a parameter in my system...
Thanks for yours replies.

Hello,

It's work ! Thank a lot.
The different in my code was on the third parameter where I wrote 0700 instead of 0600.
Encore merci pour tout!
Frederic.