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Sophos Antivirus is not running

Sophos version 9.4.0

OS X Yosemite (Mac Mini).

I keep getting this error message.  I cannot get the on-demand scanner to run.  I had an HDD crash a week or so ago and ever since I rebuilt the system with a fresh install of OS X, the Sophos on-demand scanner will not run and I keep getting the error popup "Sophos Antivirus is not running."  It works if I uninstall/reinstall...but then it quits working as soon as it updates.  I've done this process many times, which is the definition of insanity because each time I expect it to finally work.  

I can go delete the 0kb dat file, but the next time the app updates, the problem re-occurs.

Am I missing something?

I have an iMac running the same version of OS X, same version of Sophos Home and it does not have an issue.  I am at a loss as to what is causing the issue on my Mini.



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  • I just went into /library/caches/com.sophos/sav and deleted everything in that folder.
    Other articles indicate that you only need to delete the cache.dat file in this folder, however after the next update the issue comes back.

    On a whim, I just decided to try deleting everything in that folder. I forced an update and it downloaded a 161MB update file. There is nothing in the com.sophos.sav folder now, but the update created a com.sophos.sau folder in /library/caches/.

    The on-demand scanner started running again and ran ok until the application went out for another update. Now it has stopped working again and there is a 0kb cache.dat file inside /library/caches/com.sophos.sav.
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  • I just went into /library/caches/com.sophos/sav and deleted everything in that folder.
    Other articles indicate that you only need to delete the cache.dat file in this folder, however after the next update the issue comes back.

    On a whim, I just decided to try deleting everything in that folder. I forced an update and it downloaded a 161MB update file. There is nothing in the com.sophos.sav folder now, but the update created a com.sophos.sau folder in /library/caches/.

    The on-demand scanner started running again and ran ok until the application went out for another update. Now it has stopped working again and there is a 0kb cache.dat file inside /library/caches/com.sophos.sav.
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