Hi All,
I am working of an application that is able to run on *any* version on Linux.

During these days we are testing it on Linux RedHat 2.6.9-55.EL on Itanium2 and we got the failure into "execvp 13 EACCES" when our main process is trying to start a new process.

The tricky thing is that the Main process is owned by a user and the child process is instead owned by root.

Is there any security restriction in this version for Linux?
Our code works fine in any Linux version so we suspect that or
Linux RedHat 2.6.9-55.EL itanium2 add some "security" restriction for the users or some changes into execvp or maybe some changes into users or group needs to be made.

Any help is appreciated.

RHEL comes by default with SELinux enabled I believe. SELinux is like a firewall on steroids. You might try disabling it (which will require a reboot) to see if you get different results after the boot.

Also you have iptables by default - you can disable it temporarily by typing "service iptables stop" (start would restart it later).

Also you're on Itanium which is 64 bit. I'm wondering if there is some difference in the libary you need to make it work on 64 bit?

P.S. What you gave was the kernel version - to see the actual RedHat version type "cat /etc/redhat-release" and/or "cat /etc/issue".