[QGIS-Developer] Compatibility between 2.99 project files and 2.18

[Patrick Dunford]

Older versions can read enough of the project files to be functional, 
however. At some point someone will need to use an older version to 
resolve a bug in a newer version.


On 24/11/17 17:14, Nyall Dawson wrote:
> On 24 November 2017 at 14:10, Patrick Dunford <enzedrailmaps at gmail.com> wrote:
>> As of the moment I'm finding that 2.18 has difficulty correctly detecting
>> the CRS from a project file saved from the latest master. Generally
>> EPSG:3857 is detected as EPSG:4326
>>
>> Given the master is still a development version is this considered a bug in
>> 2.18 or is there still a process of defining the 3.0 project file format to
>> the point where it is reasonably compatible with older versions.
> Bad news: There is ZERO compatibility with QGIS 2.x. Moving QGIS
> projects to 3.0 is a one-way street.
>
> Nyall