SCO

You might need the OSS711a patch from SCO. It fixes a problem with kernel panics and system hangs. It is available on their website.

Hi cclonan

are you referring to OSS714A. I have MP4 installed (OSS711).

in the boot file /stand/boot our consultant has added ENABLE_4GB_MEM=YES

and so far the system has not frozzen.

---------- Post updated at 10:58 AM ---------- Previous update was at 10:52 AM ----------

Hi cclonan

are you refereing to OSS714A. I have MP4 installed (OSS711).

in the boot file /stand/boot our consultant has added ENABLE_4GB_MEM=YES

and so far the system has not frozzen.

Hi atish0

Not unless you are having trouble with usb devices.

OSS711a fixes a failure to check a reference count when releasing an Internet protocol control block (PCB) resulted in a kernel panic or system hang.

The system froze again, but this time after quite a copule of weeks, this time the office was closed for the holidays and no one logged in or using the system.

and further more I cant find any clue / logs for this freezing.

When you say the system froze again, is it a kernel panic? When you reboot does the system ask you if you want to save a dump file? Or, is the system non responsive and the only way to get it to respond again is a hard reboot?

The system becomes non responsive nor from the console or any terminal or a telnet session. and when we reboot, it doesnt ask to save the dump file. and the only way is to do a hard reboot.

Thanks for looking at the problem.

It turned out to be APC Powerchute software. If you are using the old powerchute software stop it, uninstall it and only use the software that comes with SCO 6 (mkdev apc). The core problem is with the serial ports, there is something in the serial ports that can cause software that worked great with sco 5.07 to cause SCO 6 to freeze. They changed the way that the serial ports work. So if you are not using APC powerchute software, check any software that uses serial ports.