I think the problem of Lang is different, he says:
"The problem is especially with GEM, as in this case I have double lights turned on and everything is too bright."
It is more a problem of the patch launching twice in the same pd instance, specific to OSX 10.7+ (IIRC)

Under osX, to launch two pd instances you just have to start them from terminal.
Nicolas

Le 28/08/2015 13:44, patrice colet a écrit :

 I had same problem with using init.d script from svn,
this launches pd twice at bootup, --no-gui didn't change anything...
I resolved it by restarting from an howto page:

https://help.ubuntu.com/community/UbuntuBootupHowto

by the way thanks for the lock-file trick, I had once tried to launch several pd instances
on OSX maverick, it was only possible by removing lock-files, really annoying...

patko

Le 25/08/2015 23:00, IOhannes m zmölnig a écrit :

On 08/25/2015 10:53 PM, Csaba Láng wrote:

Dear list,
is there a way to avoid that a patch which is run from a script either from
crontab or just autorun from the system runs twice?
I heard about --no-gui solution, but never managed to use it on Mac.

i don't know how "--no-gui" is supposed to help you here.
it only might obfuscate the fact that two instances are running...


i can think of two simple ways to avoid double runs:
- setup a shared-ressource (a lock-file): when the script starts it
checks for the lock-file; if it is not there, it will create the lock,
launch Pd; once Pd is finished it will remove the lock;
if the lock *is* there, the script will exit immediately.
see flock(1) on linux and shlock(1) on osx.

- stop all running instances of the patch before starting it.
usually you would just do something along the lines of `pkill -KILL pd`,
before starting a new instance of Pd.

fmasdr
IOhannes

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