Server refused to allocate pty

Searched for solution for "Server refused to allocate pty" and tried all suggestions but nothing is fixing the error and no users can log in.

Verified file permissions in solutions are set correctly
Ran pkgchk -a -f
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Depending on which OS you are using, there is a configuration that deals with how many pts/tty the system can allocate.
If you are on a linux, check the contents of /proc/sys/kernel/pty/max
This should tell you what the max allocation.
what is your OS? when are you getting this error?
what solutions you tried?
OS is SCO, that is clear....
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Check the files,  

# ls -al  /dev/pty*
sdaehn07Author Commented:
The OS is Solaris 10 09/10  

All the solutions that were posted before I posted my question were tried with no success..

On a whim I rebooted the server and the problem magically went away.  I don't know what broke it in the first place but it is resolved now.

Thank you!
The below is a way to get the current limits on your system as well as how to increase the limits.
Do you have more than 48 users logging in at any one time?

You might be running against a limit based on the resources available on your system.

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Unix OS

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