live cd install used usb installer ?
16 Jun 2013 20:54 #35707
by klein
live cd install used usb installer ? was created by klein
hi i'm new to Linuxcnc but not new to linux , i tried to install the live cd and had errors getting it installed so i used multisystem usb installer to install ubuntu-10.04-linuxcnc3-i386.iso install went as normal for any other linux install running the uname -a gives me 2.6.32-122-rtai #rtai SMP Tue Jul 27 12:44:07 CDT 2010 i686 GNU/Linux so i'm running the rtai kernel i installed it i have not done anything else but booter it up, i was going through a tutorial on pyvcp and when i run the command pyvcp -c mypanel tiny.xml
it returns in my terminal RTAPI: ERROR: could not open shared memory (errno=2) Segmentation fault, is there something else i need to do after the install when reading i don't seem to have some of the directories i have been reading about with others that have this problem i do have /usr/realtime-2.6.32-122-rtai but everything else looks the same
it returns in my terminal RTAPI: ERROR: could not open shared memory (errno=2) Segmentation fault, is there something else i need to do after the install when reading i don't seem to have some of the directories i have been reading about with others that have this problem i do have /usr/realtime-2.6.32-122-rtai but everything else looks the same
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16 Jun 2013 22:06 #35713
by ArcEye
Replied by ArcEye on topic live cd install used usb installer ?
Hi
If you got this, which is identical to what you describe
root@INTEL-QUAD:/# pyvcp -c mypanel tiny.xml
RTAPI: ERROR: could not open shared memory (errno=2)
RTAPI: Locked memory limit is 64KiB, recommended at least 20480KiB.
This can cause the error 'could not open shared memory'.
For more information, see
wiki.linuxcnc.org/cgi-bin/emcinfo.pl?LockedMemory
Segmentation fault
The answer is simple, re-read the docs and you will see that the command should be
halrun -I loadusr pyvcp -c mypanel tiny.xml
Without halrun, realtime is not loaded, which is why it could not access shared memory, there wasn't any.
regards
If you got this, which is identical to what you describe
root@INTEL-QUAD:/# pyvcp -c mypanel tiny.xml
RTAPI: ERROR: could not open shared memory (errno=2)
RTAPI: Locked memory limit is 64KiB, recommended at least 20480KiB.
This can cause the error 'could not open shared memory'.
For more information, see
wiki.linuxcnc.org/cgi-bin/emcinfo.pl?LockedMemory
Segmentation fault
The answer is simple, re-read the docs and you will see that the command should be
halrun -I loadusr pyvcp -c mypanel tiny.xml
Without halrun, realtime is not loaded, which is why it could not access shared memory, there wasn't any.
regards
The following user(s) said Thank You: klein
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16 Jun 2013 22:43 #35714
by klein
Replied by klein on topic live cd install used usb installer ?
thank you ArcEye
i did have /etc/security/limits.conf (* - memlock 20480 #EMC2) was already there but had to add (session required pam_limits.so) to /etc/pam.d/common-session now it works as expected and after checking i was working with the tutorial for emc2 and not emc 2.4 is there a pyvcp tutorial for emc 2.5?
i did have /etc/security/limits.conf (* - memlock 20480 #EMC2) was already there but had to add (session required pam_limits.so) to /etc/pam.d/common-session now it works as expected and after checking i was working with the tutorial for emc2 and not emc 2.4 is there a pyvcp tutorial for emc 2.5?
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16 Jun 2013 23:11 #35716
by ArcEye
Replied by ArcEye on topic live cd install used usb installer ?
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