Question regarding recent changes to operation queue usage

[tedrog36]

Marco - I see that the code no longer uses the FCModelDatabaseQueue for handling database operations and instead dispatches to main queue via this inline: fcm_onMainThread. I am running into an issue that seems to be happening much more frequently on iOS10 and I wondering whether you have some info on what prompted this change? As I am hoping this will fix my problem too.

This issue I am seeing is I am getting this error occasionally from FMDB library:
: Unknown error calling sqlite3_step (10: disk I/O error) rs

Ted