System.UnauthorizedAccessException thrown for NAS file share

devon · **Joined:** June 12th, 2013, 4:18 am **Posts:** 3

Recently been getting these errors a lot

Couldn't write XML to \\athena\media2\TV\Continuing\<some series>\series.xml

I know the share im mapping to (QNAP NAS) is writable. I can open Explorer and manually create/rename/delete folders.

I opened the troubleshooter and tried the path and it told me that the user im logged on as doesnt have privileges.... Well yes thats true and its why i map to the drive with a user that does.....

Then i tried mapping a drive letter, same issue. (output below). However its odd because MCM doesnt have a problem moving movies and episodes to that very same share, it just randomly cant open series.xml. At first i thought maybe plex is locking series.xml and then i realised plex cant couldnt give a wet fart about an xml file....

20:53 :: Testing on path: y:
20:53 :: ... checking that the path exists
20:53 :: ...... finished successfully
20:53 :: ... testing path attributes (hidden, system, read-only, and offline)
20:53 :: ...... finished successfully
20:53 :: ... getting contents for this path
20:53 :: ...... finished successfully
20:53 :: ... creating an empty XML file ('_MCM_troubleshooter.xml')
20:53 :: ...... finished successfully
20:53 :: ... deleting the empty XML file ('_MCM_troubleshooter.xml')
20:53 :: ...... finished successfully
20:53 :: ... creating an empty picture file ('_MCM_troubleshooter.jpg')
20:53 :: ...... finished successfully
20:53 :: ... deleting the empty picture file ('_MCM_troubleshooter.jpg')
20:53 :: ... checking all existing files in this path
20:53 :: ...... error: access denied exception thrown by the .Net framework
20:53 :: ...... the user account 'MEDIA\Administrator', does not have read/list access to y: (nor does any group the user belongs to)
20:53 :: ...... (.Net framework's System.IO.Directory.GetFiles() threw an exception)
20:53 :: ...... (exception thrown: System.UnauthorizedAccessException, Access to the path 'Y:\Movies\Movies' is denied.)

Support Information generated by Media Center Master:

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Media Center Master preferences and settings (from registry):

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Detailed Version Information:

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Pete · **Posted:** May 3rd, 2017, 9:29 am

devon wrote:

I know the share im mapping to (QNAP NAS) is writable. I can open Explorer and manually create/rename/delete folders.

Keep in mind context levels!

The same user elevated and non-elevated have different permissions. Since Media Center Master is elevated, my first suggestion would be to simply disable UAC elevation and restart MCM.

Given that the troubleshooter itself is identifying the error, there's little more I can do for you. A barebones .Net app that's been elevated is trying to System.IO.Directory.GetFiles() on your path and Windows is telling the app that there is no permission to do so.

devon · **Joined:** June 12th, 2013, 4:18 am **Posts:** 3

I see what youre trying to say. I would say however that the only context that matters here is the permissions on the fileshare that are in this case managed by the NAS (Linux). If MCM is accessing the share its using the credentials provided when i mapped the drive, UAC etc be damned as the credentials to access the share are inviolate and dont change.

MCM is accessing the share to upload and it appears to randomly open some files to edit and be locked out on others. To be honest im not entirely certain its a MCM issue, i was just thrown by the diagnostics telling me i couldnt access a volume that i patently could. I hoped that you had a major answer in one of those mystical "Ive just had the exact same issue! Heres the fix...." moments

As of right now im kinda stumped to diagnose the real cause but ive cleared the issue by rebooting the entire environment. Plex server (on CentOS), QNAP TS NAS and last but not least good ol MCM running on a Windows 2012 R2 server running on an ESXi VM. In the rare case that someone has the same issue and circumstance i can heartily recommend the three fingered salute to your entire stack. And if you have trouble with that, go play with your breaker switches - just kidding

I guess you can mark this one as Unable to replicate

System.UnauthorizedAccessException thrown for NAS file share [SOLVED]

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