It's present in box4 but not box3. Looks like Chris Muller added it, /etc/security/limits.d/squeak.conf, to box4 6 Sept 2013. Perhaps it was for that SS with Magma experiment of his? At any rate, if you add it to box3, then you should be able to proceed. 

Chris 

On Jun 20, 2014, at 10:14 PM, Chris Cunnington <brasspen at gmail.com> wrote:

> That's interesting. Works for me. I added that, /etc/security/limits.d/squeak.conf to my Dell Sputnik Ubuntu and the VMs that hitherto would not start, cogmtlinuxht and coglinuxht in the 3000 series, start just fine. Very nice. 
> 
> Chris 
> 
> On Jun 20, 2014, at 9:48 PM, Bob Westergaard <bwestergaard at gmail.com> wrote:
> 
>> On Fri, Jun 20, 2014 at 2:39 PM, Frank Shearar <frank.shearar at gmail.com> wrote:
>>> pthread_setschedparam failed; consider using ITIMER_HEARTBEAT:
>>> Operation not permitted
>> 
>>> From the source:
>> 
>>   http://squeakvm.org/cgi-bin/viewvc.cgi/squeak/branches/Cog/platforms/unix/vm/sqUnixHeartbeat.c?revision=2935&view=markup#l360
>> 
>> it looks like maybe you do not have permissions to set thread
>> priorities.  Did you configure /etc/security/limits.d/squeak.conf?  If
>> not, then there are some instructions here:
>> 
>> http://forum.world.st/New-Cog-VMs-available-td4701895.html
>> 
>> Regards,
>> -- Bob
>> 
>