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CoreTelephony Trace File Error

Have an CoreTelephony Trace File Error, a file operation has failed, you may be out of space. Details: 'Failed to create directory /Network (0755)

Error occurred then user log in, after installing El Capitan.

What I can do?

iMac, OS X El Capitan (10.11)

Posted on Oct 2, 2015 12:10 AM

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Posted on Oct 2, 2015 8:49 AM

Having the exact same issue as rgorelik. This issue appears on login of any user on my mac mini and when I attempt to connect to network drives, disconnecting me from said drives the second the message pop-up. Any ideas are greatly appreciated.

77 replies

Oct 7, 2015 9:12 PM in response to rgorelik

Exact same error/dialog here following an upgrade to El Capitan 10.11 from Yosemite 10.10.5 on an iMac.

- Replaced /System/Library/Frameworks/CoreTelephony.framework from the El Capitan installer

- Deleted/reset all the iMessage DB/files/plists (I had no problems with iMessage, it was already and is still working fine under El Capitan)

- Same error occurs under a new test user-account (makes it look like a system-config/corruption/bug problem)


No issues with iCloud, iMessage, connecting to CIFS network shares, etc. Dialog pops up after user login, hangs around waiting for me to click "OK", and if ignored, it'll go away on its own after a few mins.


Of interest in my config, I have two drive, one SSD and one HDD. The iMac boots from SSD, but the actual "Home Directory" (/User) has been relocated to the HDD with a link pointing to the new location. Perhaps the 0755 error indicates that the new/beta CoreTelephony.framework cannot directly write to the filesystem linked "/User" folder as the actual/real HFS+ FS path is "/Volumes/DataDrive/Users/" (eg: a hardcoded FS write attempt to the /User path)? If this is the case, perhaps this is simply a minor bug that can be easily addressed in an update... If not, it must be a specific/unique mis-configuration issue.


Any ideas/trouble-shooting welcome! No joy from the folks at Apple (iMac is out of support window).

Oct 10, 2015 10:55 AM in response to rgorelik

Same issue here with iMac 27 inch, Retina 5k. User files are all external. Internal SSD only has system, programs and link to user directory. Another error occurs when I try to sync my contacts with a Baikal server. According to some other sources El Capitan update obviously creates some error when trying to access the user database on the server. It cannot identify the user as having access rights. Some people report about a workaround for owncloud.

Both errors started to occur at the same time. Not sure if they are connected.

CoreTelephony Trace File Error

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