I've prepared a machinekit setup with no UI (in a Beaglebone, using the 
last SD images on 
http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#BBW.2FBBB_.28All_Revs.29_Machinekit)
 
 in order to send/receive commands from an external server. It's just a 
bunch of python scripts connected to machinekit through the HAL.

Everything works fine, but I'm having random errors where everything goes 
down... the typical symptoms are:
- "libnml/buffer/shmem.cc 507: SHMEM: Can't take semaphore" message on 
/tmp/linuxcnc.print
- "/usr/bin/ipcs" shows no semaphores
- 'emcStatusBuffer invalid err=5' when doing "s.poll()" on my Python script.

Machinekit keeps working, but seems the HAL goes down, and I can't access 
it anymore.

Initially I thought this could be related to the memlock limit, but after 
changing it, the behaviour is still the same... sometimes everything works 
fine for more than 20hours, other times the system fails after a couple of 
hours...

Couldn't find any reference to those errors out there... has anyone seen 
this kind of issues on their setup?

Thanks in advance

-- 
website: http://www.machinekit.io blog: http://blog.machinekit.io github: 
https://github.com/machinekit
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