R devel - Feb 2018 - Warning from Sys.junction when using network drive.

I am running 3.4.3 on a windows server and I ran the code in a new session.


I get a warning when running packrat::init() on a project that is located on a
windows network drive.
The warning I get is


Warning message:
cannot set reparse point 'U:/packrat5/packrat/lib-R/base', reason
'Access is denied'


The error is created based inside the function .Internal(mkjunction(fr, link))
which is called from Sys.junction().  I have run Sys.junction inside the RStudio
debugger and I checked that the 'U:/packrat5/packrat/lib-R/base'
could be accessed via the windows file explorer before the
.Internal(mkjunction(fr, link)) call is made.  Looking at the code for
do_mkjunction(), the warning looks to be thrown based on the return status from
DeviceIoControl.


I setup a project on the C: drive and tried the same packrat::init() code.

The call to .Internal(mkjunction(fr, link)) did not produce an error.


I would appreciate any help you can provide on this issue.

Thanks,

Mark

	[[alternative HTML version deleted]]

Unfortunately, junctions cannot link to a network drive, they only can 
link directories on the same computer (possibly on different local 
volumes). This is a limitation imposed by Windows. I have updated the 
documentation for Sys.junction in R-devel accordingly.

Tomas

On 02/06/2018 10:50 PM, MARK BANGHART wrote:
> I am running 3.4.3 on a windows server and I ran the code in a new session.
>
>
> I get a warning when running packrat::init() on a project that is located
on a windows network drive.
> The warning I get is
>
>
> Warning message:
> cannot set reparse point 'U:/packrat5/packrat/lib-R/base', reason
'Access is denied'
>
>
> The error is created based inside the function .Internal(mkjunction(fr,
link)) which is called from Sys.junction().  I have run Sys.junction inside the
RStudio debugger and I checked that the 'U:/packrat5/packrat/lib-R/base'
> could be accessed via the windows file explorer before the
.Internal(mkjunction(fr, link)) call is made.  Looking at the code for
do_mkjunction(), the warning looks to be thrown based on the return status from
DeviceIoControl.
>
>
> I setup a project on the C: drive and tried the same packrat::init() code.
>
> The call to .Internal(mkjunction(fr, link)) did not produce an error.
>
>
> I would appreciate any help you can provide on this issue.
>
> Thanks,
>
> Mark
>
> 	[[alternative HTML version deleted]]
>
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