[mythtv-users] Incompatible versions

Paul Harrison mythtv at mythqml.net
Mon Nov 28 11:04:20 UTC 2022

On 25/11/2022 11:49, Daryl McDonald wrote:

> On Fri, Nov 25, 2022 at 6:03 AM Paul Harrison <mythtv at mythqml.net> wrote:
>     On 24/11/2022 17:26, Ken Smith via mythtv-users wrote:
>     > User Notice at /usr/share/mythtv/bindings/php/MythBackend.php,
>     line 109:
>     > !!NoTrans: Incompatible protocol version (mythweb=91, backend=72)!!
>     MythProtocol version 72 is from MythTV v0.25
>     MythProtocol version 91 is from the current schema which hasn't
>     changed
>     from MythTV v0.29 or later but the the wiki may need updating and I'm
>     too lazy to check properly :)
>     https://www.mythtv.org/wiki/Category:Myth_Protocol
>     So basically the backend that is running is from v0.25. Did you run
>     mythtv-setup as Stephen suggested to make sure the DB schema got
>     updated
>     properly? Did you restart the backend afterwards? You can use
>     mythbackend --version to check the version.
>     Paul H.
> I thought the database had to be updated incrementally, 25 >27>29...

You are correct there are some really old versions of MythTV that you 
can't directly update to current versions but you should be fine with 
anything like 0.25 or newer.

One thing I would say is depending on how big your database is and how 
many recordings, videos etc. you have it could take a long time to 
update the DB so be patient don't assume because it looks like nothing 
is happening that the update has frozen it could just be taking a long 
time especially with a large DB and an older version of MythTV with a 
lot of updates to perform. Also the backup that is created before the 
update can take a long time on large DB's so again be patient.

Paul H.
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