A user with an older version is not able to open a project I sent them. Can a model be saved down to an earlier version?
A model cannot be saved ‘down’ and most versions are not forwards compatible. For example, if you’ve created and saved a model in WaterGEMS V8 XM, a user with WaterGEMS V7.0 will not be able to open it. V8 XM has introduced many new element types and features, which cannot be interpreted by the older version. Also, there have been numerous service packs of V8, many of which are also not forward compatible. For example, build 08.09.165.00 can open models saved in 08.09.165.12, but cannot open models saved in 08.09.400.34+. The reason is because the structure of the database files used to store model data (the ‘schema’) was changed to accomodate improvements and new features. The older versions cannot interpret the new database format. If the user is not able to upgrade to your version, the best workaround would be to export the model to the standard EPANET 2.0 format (File > Export > EPANET). This format can be opened in most older version. For example in V7.0, you can import EPANET via
