Core Telephony Trace File Error
Just a couple of days ago, when starting up my Mac with El Capitan, an error message comes up,
CoreTelephony Trace File Error
A file for CoreTelephony tracing has failed, you may be out of disk space. Details "error opening file/tmp.ct.shutdown, err= Operation not permitted.
Everything on my Mac seems to be running as normal except when I tried to open Photoshop Elements 13. Neither the film programme nor the photo programme will open. These have worked perfectly well for a long time so I don't understand what has happened.
I use both the programmes regularly so hope someone will come up with a solution. A simple one too, I hope, as I am not an IT person.
The software was purchased in a shop and is on a disc, not a download. I pondered reinstalling it but fear that the serial number will not be accepted if I do this.
Thank you
iMac with Retina 5K display, iOS 8.3