[Rd] parallel::detectCores(TRUE) gives: Error in system(cmd, TRUE) : error in running command

[Marius Hofert]

Thanks, Bill. The output is:

> trace(system, quote(print(command)))
  parallel::detectCores(TRUE)
Tracing function "system" in package "base"
[1] "system"
>
Tracing system(cmd, TRUE) on entry
[1] "/usr/sbin/sysctl -n hw.ncpu 2>/dev/null"
Error in system(cmd, TRUE) : error in running command
>

On Fri, Aug 22, 2014 at 6:13 PM, William Dunlap <wdunlap at tibco.com> wrote:
> The same is true in R-2.14.1 on  Ubuntu 12.04.4 LTS .  Put a trace on
> system with
>   trace(system, quote(print(command)))
>   parallel::detectCores(TRUE)
> and you will see the offending shell command.
> Bill Dunlap
> TIBCO Software
> wdunlap tibco.com
>
>
> On Fri, Aug 22, 2014 at 1:03 PM, Marius Hofert
> <marius.hofert at uwaterloo.ca> wrote:
>> Hi,
>>
>> Both under the current R-devel (r66456) and a version from about 3
>> months ago, I experience the following behavior:
>>
>>> parallel::detectCores(TRUE)
>> Error in system(cmd, TRUE) : error in running command
>>> traceback()
>> 3: system(cmd, TRUE)
>> 2: gsub("^ +", "", system(cmd, TRUE)[1])
>> 1: parallel::detectCores(TRUE)
>>>
>>
>> This is on Ubuntu 14.04. Does anybody else see this? [I currently have
>> quite a heavy workload, otherwise I would have installed and tested it
>> also under 3.1.1]
>>
>> Cheers,
>>
>> Marius
>>
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