[Opensim-dev] From today, version 1.0 OAR files cannot be loaded into OpenSim 0.7.0.2 and earlier

[diva at metaverseink.com]

Everything is still compatible.

I haven't seen the latest changes that Justin made on the flags, but the 
following is true:

- oars produced in older versions of OpenSim can be uploaded in newer 
versions, always and forever.

- oars produced in newer versions of OpenSim may or may not be able to 
be uploaded in older versions, in general. As of right now, even though 
we've rewritten the serialization from the ground up, things are still 
compatible in that direction (newer oars->older opensims). As we improve 
things (like adding creator information, for example), if we ever come 
to a point where compatibility in this direction cannot be ensured, 
there will always be a flag to generate older oar formats.

Hope this clarifies things.

On 10/16/2010 7:08 AM, drwhiet at spacefriends.de wrote:
> Uhh ohhh .. Justin, i also Need to ask if this affects this weekends Upgrade on osgrid ?? As i am just creating .oar Files right now?
>
> Best regards
>
> Am 16.10.2010 um 07:12 schrieb Justin Clark-Casey<jjustincc at googlemail.com>:
>
>> Hi folks.
>>
>> The object serialization format has been changed today, therefore I have been forced to bump the OAR version from 0.3 to 1.0
>>
>> This means that 1.0 OARs cannot be loaded into OpenSim 0.7.0.2 and earlier.  Unfortunately, since these earlier OpenSim releases do not check the OAR version before loading, the loader will probably receive a huge number of cryptic errors about the xml not being correct, which will be extremely confusing to everyone.
>>
>> If you want to produce OARs that can be loaded on OpenSim with current master code, you must specify --version=0 on the command line, e.g.
>>
>> save oar --version=0 oars/my.oar
>>
>> This will create an older (pre-today) style 0.3 OAR which can be loaded into older OpenSim versions.  There is currently no advantage in creating a 1.0 OAR rather than a 0.3 one.
>>
>> OpenSim master code and the forthcoming OpenSim 0.7.1 will be able to load both 0.3 and 1.0 OARs.
>>
>> --
>> Justin Clark-Casey (justincc)
>> http://justincc.org
>> http://twitter.com/justincc
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