soo I Found on another forum
 I'm putting this on the General MC Message Board because it affects all Nav units from 2001-2017. If this isn't the appropriate place, I'm sure one of the Mods will move it.
For those looking to update their Nav mapsets to the latest version, be forewarned that Garmin has pulled 2019.10 since they found a problem with the maps their vendor supplied. The current version has been rolled back to 2018.30. Garmin tech support indicated that they expect the problem to be fixed shortly. There was no explanation of what the problem is.
Unless their developers are really not paying attention, I do not think that 2019.10 will be re-released. The confusion would be horrendous. Expect 2019.11 or the next major version number, 2019.20.
If you have already updated to 2019.10 and your Nav is working correctly, fine. As previously stated, Garmin gave no indication of what the problem is, but it was serious enough to pull the update. If you run into problems, consider rolling back to 2018.30 for the time being.
Bob 
and this:
B version and final 2019.10 version
Name           Format         File Size
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0607E77L.asr   ASR       457.079,890 KB
0607E77O.asr   ASR       422.267,440 KB
0607E77N.asr   ASR       248.635,830 KB
0607E77M.asr   ASR        69.145,261 KB
0607E77K.srx   SRX        62.339,991 KB
D3397240B.db   DB          9.892,000 KB
D3398240B.sid  SID       155.934,780 KB
D3406240B.sid  SID       135.712,630 KB
D3157250B.sid  SID       396.283,450 KB
D2656270B.sid  SID       633.932,630 KB
D3191250B.jcv  JCV       498.880,010 KB
gmaptz.img     IMG           574,000 KB
gmapprom.img   IMG     2.802.944,000 KB
gmap3d.img     IMG       234.136,000 KB
gmapdem.img    IMG       608.976,000 KB
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