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After upgrading to MacOS 10.12.4 today, I started getting tons of Error/Fault log message in the Console generated by the CalendarAgent process. Some of the errors are pasted below: 

error: sql cached statement NSSQLiteStatement <0x7fae52e27ad0> on entity 'CalDAVError' with sql text 'SELECT t0.Z_ENT, t0.Z_PK, t0.Z_OPT, t0.ZCODE, t0.ZDOMAIN, t0.ZUSERINFO, t0.ZCHANGEREQUEST, t0.Z8_CHANGEREQUEST, t0.ZPRINCIPAL, t0.ZOPERATION, t0.ZPRINCIPAL1, t0.ZPUBLICATION, t0.ZSUBSCRIPTIONINFO FROM ZERROR t0 WHERE ( t0.ZPRINCIPAL IN (SELECT * FROM _Z_intarray0)  AND  t0.Z_ENT = ?) ' failed due to missing variable binding for (null) with expecting bindings (
    "<NSSQLBindVariable: 0x7fae52eed410>"
) but actual substitution variables {
    destinations = "{0x400072b <x-coredata://F6135326-AEE3-4C69-AD55-060EF81D21A6/CalDAVPrincipal/p16>}";
}

error: sql cached statement NSSQLiteStatement <0x7fae551cadc0> on entity 'Attachment' with sql text 'SELECT 0, t0.Z_PK, t0.Z_OPT, t0.ZATTACHMENTID, t0.ZCONTENTTYPE, t0.ZFILENAMEINCACHE, t0.ZFILENAMESUGGESTEDBYSERVER, t0.ZISAUTOARCHIVED, t0.ZISCACHED, t0.ZOMITSYNCRECORD, t0.ZPATHONDISKSTRING, t0.ZURLSTRING, t0.ZUUID, t0.ZITEM, t0.Z4_ITEM FROM ZATTACHMENT t0 WHERE  t0.ZITEM IN (SELECT * FROM _Z_intarray0)  ORDER BY t0.ZITEM' failed due to missing variable binding for (null) with expecting bindings (
) but actual substitution variables {
    destinations = "{0xd340030b <x-coredata://F6135326-AEE3-4C69-AD55-060EF81D21A6/Event/p845>, 0xf2c0030b <x-coredata://F6135326-AEE3-4C69-AD55-060EF81D21A6/Event/p971>}";
}

The number of errors generated within a few minutes is more than 6000!. What do you think the reason could be? If you think I need to add more details, please state in the comments.

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  • Discovered same today.. researching it now. You found an answer?
    – J.C. Matos
    Apr 10, 2017 at 23:09
  • @J.C.Matos no, not yet. I have tried to remove some of the calendar-related files to no avail. There are quite many other I get sporadically.
    – Ahmadov
    Apr 11, 2017 at 8:15
  • 1
    In 10.12 they completely revamped console and the logging subsystem. Unfort it is way too verbose now. If you're not actually experiencing a problem then it's probably safe to ignore.
    – Hefewe1zen
    May 13, 2017 at 17:50
  • @Hefewe1zen Yes, that is what I also suspect due to the fact that, as you stated, the number of errors generated are staggering. Other processes as well produce tons of error messages.
    – Ahmadov
    May 13, 2017 at 21:33
  • Is this problem still present or did you fix it?
    – dan
    Mar 13, 2018 at 20:12

1 Answer 1

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The possible problem is that database schema or some of database entries are incompatible with latest Calendar app. Or may be these entries are corrupted.

There are 2 possible solutions:

  • fix db which is tricky.

  • drop db - it's just cached data of your cloud accounts.

to do the 2nd option:

  • stop Calendar App (ctrl+q), then
  • open ~/Library/Calendars and
  • remove Calendar Cache files (you may just trash them)
  • start Calendar App again.

You will need probably reactivate your calendar accounts.

To do so, open calendar app settings and choose desired accounts in accounts section

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  • 2
    Welcome to Ask Different. We like answers to be more than just a single line. Ideally, you want to explain why your answer is *right." It also helps to provide links, citations, and/or screen shots. Please review our help section How to Answer on writing good answers to questions
    – Allan
    May 13, 2017 at 10:11
  • Did I just get down voted for a correct answer because I was too concise? This is not rocket science...
    – xtfer
    May 13, 2017 at 14:06
  • I didn't downvote you (I only downvote when there's egregious errors) and I disagree (very emphatically) with the voter if that was the premise. I will upvote to cancel it out; though you should consider rewriting/expanding to explain what you are doing and why.
    – Allan
    May 13, 2017 at 14:15
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    @xtfer I am guessing your concise and to-the-point answer actually solved my problem :) So, thanks for that and do not worry about the downvotes. No matter how you try to abide by the Stackoverflow regulations, there will always be someone to downvote:)
    – Ahmadov
    May 13, 2017 at 21:50
  • Alas, makes no difference here, the problem recurs.
    – Aidan Fitzpatrick
    May 23, 2017 at 11:37

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