Crash during sync

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Re: Crash during sync

by Ludek » Sun Jul 21, 2019 4:52 am

Yes, we got plenty of crash logs BD7A8C4C from you, but it did not give us enough info why it happened. Therefore I asked you to generate also the standard (full) debug log (item 4b).

But supposing you are no longer able to replicate the crash then the debug log would be useless. Just wonder what was the trick re "have just done what I needed to do to make this stop happening" ?

Re: 'pauses' are more like 4-5 minutes -- this is unexpected, here the debug log (4b) also would show what is the reason for such a long pauses.

Re: Crash during sync

by TonyGeeee » Fri Jul 19, 2019 2:54 pm

Thanks for the info re: the long sync pauses. Pretty much explains that (except for the fact that my 'pauses' are more like 4-5 minutes instead of the listed times.

Regarding the freezing on sync, I have just done what I needed to do to make this stop happening and I spent hours making that happen, so feel free to close the ticket on this issue. Hopefully it will get worked out when MM5 goes gold. Also, FYI, I sent plenty of log reports after this behaviour, so you should already have the log files to examine.

Thank you.


Re: Crash during sync

by Ludek » Fri Jul 19, 2019 8:31 am


1) re the exception BD7A8C4C : I see that there is an exception in f_mp4.dll when parsing file tags.
I guess this is specific to certain and particular files on your PC, could you try to locate the files on which this exception appears and share a sample file with us?
You can test it by selecting the file(s) > right-click > Send to iPhone.

EDIT: or generate full debug log (item 4b here: ... 30&t=86643) so that I can see what was the last file for which the crash occured. The crash log contains just several last lines from the DbgView and I am not able to determine on which file it crashed.

2) re the freezes, this is caused by commit batches, MM5 uploads a batch of files at first (which is fast) and then commits it. The commiting usually takes several seconds. So that's expected behaviour related to the workflow described in a greater detail here: ... 362#c41031

Re: Crash during sync

by TonyGeeee » Mon Jul 15, 2019 12:53 pm

Random tracks. Random numbers of fast syncs between the freezes. All songs are mp3 format.

Re: Crash during sync

by PetrCBR » Mon Jul 15, 2019 12:52 pm

Will it 'freeze' always on same tracks or it's random ? That kind of tracks do you synchronize ? mp3's ?

Re: Crash during sync

by TonyGeeee » Mon Jul 15, 2019 9:55 am

An update: I broke my 30K iPhone playlist into 9 smaller playlists, and I'm having better luck with that. One thing that has remained consistent, however. The sync will be moving along nicely, then it will pause for a very, very long time on one song. Typically it will start syncing again at the normal rate, but after some time, it will "stick" on a song again. I have checked and the delay does not seem to be due to file conversion, nor large file size. I have not yet determined why it is behaving this way. Hope this helps.

Crash during sync

by TonyGeeee » Mon Jul 15, 2019 6:50 am

Environment is Windows 10 (Build 18936) syncing to an iPhone X (iOS 13 Beta 2). Trying to sync a playlist, MM consistently crashes during the sync. The Log ID generated is BD7A8C4C. I have sent multiple logs successfully after this happens. Please let me know how to proceed. Thanks. --Tony