eWater is pleased to announce the latest Beta Release of Source version 6.11. Key enhancements in version 6.11 Beta include:

Model Algorithm Changes:

Added the ability to manually override the calculated order travel time on a Storage Routing Link. This gives users a way to correct for the rounding of travel time that can occur at confluences, where two branches with different travel times join and the combined travel time is affected.

Fixed an issue where a storage configured with "Do Not Order From Upstream Storages" could still have its upstream storage's maximum constraint propagate downstream. This prevented unmet orders from correctly diverting to a backup storage when the primary storage ran dry. Orders now divert to the backup storage as expected.

Fixed Minimum and Maximum constraint recorders returning zero at the most downstream node in a system (for example, Environmental Flow Nodes, Minimum Flow Requirement nodes, and gauge nodes), even when constraints were configured on the upstream link. These recorders now correctly reflect the configured constraint values.

New Features & Improvements:

Added a new Stacked Mountain Chart type, allowing multiple time series to be displayed together as a single stacked chart type. Hovering over a component of the Stacked Mountain Chart displays a tooltip indicating the associated time series and X, Y values at that point. The chart tooltip "Hint" icon now has a dropdown offering None, Show all, and Show single point display options. These options are available across all chart types where multiple time series can be displayed on a single custom chart.

Removed the unused "Orders" recorder from the parameters list. This recorder has not produced any output in Results Manager since the Recording Manager was retired in earlier versions; the Orders >> Arriving at Current Timestep recorder provides the equivalent information.

Bug Fixes:

Reworked the Arrange Nodes plugin. It now opens in its own window instead of as a docked panel, the "Save" button has been replaced with "Apply" (which updates the schematic layout immediately, with no need to reload the scenario), and a "Close" button has been added. The plugin provides options to automatically re-arrange nodes based on schematic coordinates.

Fixed a crash when opening the Statistics tab for a "Time" recorder in Results Manager (e.g. "Time in current spell"). This affected any project using Environmental Flow Node actions with a time-based recorder.

Fixed command-line client/server processes failing to run when launched from a working directory different to the Source installation directory.

If a storage node configuration error causes a Commandline run to crash, the Commandline error output now includes the name of the affected storage (e.g. Storage 'X': ), making it easier to identify which storage caused the fatal error.

View detailed release notes: 6.11 Beta Release (August 2026)

eWater is pleased to announce the latest Beta Release of Source version 6.3. Key enhancements in version 6.3 include:

Model Algorithm Changes:

Marker Routing: Updated the New Marker Storage Logic to handle more edge cases. This new logic is considered experimental and still in testing. All identified referential integrity failures have been analyzed and resolved, ensuring Marker relationships correctly reflect upstream/downstream positioning and do not retain references to deleted Markers in large-scale models.

Environmental Flow Node - Recorders:

Added a new recorder “Observer - Total Successful Seasons In Run" that records the cumulative count of seasons that have met the defined success criteria for an action over the model run. The value increments once per season at the point when seasonal success is first achieved, based on the Spell Observer. Returns a time series. Returns NaN if the Spell Observer is disabled.

Added a new recorder “Observer – Percentage Of Successful Seasons”. This recorder calculates the percentage of completed seasons that have been successful for an action. Computed as the ratio of total successful seasons to total completed observation seasons, expressed as a percentage. The denominator increments at the end of each season. Returns a time series. Returns NaN if the Spell Observer is disabled.

Added a new recorder “Observer – Forced Event Condition”. This recorder outputs a 0–1 condition value that calculates it based on the time since the last successful season, scaled by the Number of season failures before forcing. Uses an exponential decay function consistent with the Antecedent Condition, but replaces the desired frequency with a tolerance for consecutive failed seasons. Returns a time series. Returns NaN if the Spell Observer is disabled.

Bug Fixes:

Fixed the Trend forecast model in Inflow and Confluence nodes (also Gauge nodes in Operations Mode) not working correctly. A long-standing issue where the Trend forecast model produced incorrect results in these nodes has been resolved. This affected versions from 5.61 onwards.

Fixed a bug in the Harvest Storage Accounting dialog that truncated node names. The Supply Points list in the Floodplain Harvesting Event Occurrence section had a fixed column width that cut off longer node names present in many jurisdictional models. The column width is now flexible to accommodate longer names, and scroll behavior for storage nodes has also been corrected.

Fixed an issue with constituent model table import failing for Power Function (flow in mm). Users upgrading to Source v6.0 or later were blocked from importing parameter tables due to an unexpected conversion factor error, even when re-importing a file that had just been exported without modification. This was a high-impact issue particularly for users with large parameter tables (1000+ rows), such as constituent model specifications.

Fixed inconsistent results where repeated runs of the same scenario could produce different outcomes. This occurred rarely when using Environmental Flow Nodes, leading to divergent behavior. This affected users running Source 5.60 and later.

Results Manager Changes:

Improved error handling to prevent Source crashes triggered from Results Manager toolbar actions. Source was crashing when certain toolbar items were triggered, for example when clicking a filename after that file had been renamed or moved on disk. Error handling has been strengthened so these interactions produce graceful failures rather than application crashes. This was reproducible across multiple Source versions including v6.1 and v6.2.

Fixed a crash when loading a plain .csv (non-.res.csv) file in Results Manager. When a plain CSV file was loaded via File > Load Time Series, clicking on the filename in the Loaded Time Series list caused Source to hang and crash. This was related to incorrect handling of unit preference interactions for non-Source result files.

Added "Show All Series" / "Hide All Series" context menu options in Results Manager charts. Operators who use Results Manager to communicate with stakeholders can now right-click the chart legend and toggle all plot lines on or off at once via these two new menu items. This removes the need to manually uncheck each series when working with charts that have many outputs. All other chart behavior, including data visibility in the Table and Statistics tabs, is unchanged.

Added the ability to delete multiple runs in Results Manager. Users can now select multiple runs using “Ctrl+Click” and delete them in a single action via a new Delete Selected context menu option or the keyboard Delete key. This addresses memory pressure on devices with limited RAM (16 GB) where accumulating many runs causes performance degradation. The Latest Run remains protected from deletion.

Fixed an issue where Mountain chart type not applying Shared Settings colors. When the “Use shared setting” checkbox was checked for a Mountain chart, changes to Shared Settings colors were not being applied to the chart.

Tabular Editor Changes:

Added a day-of-week display option in the Tabular Editor. A new context menu on the Time column header lets users choose between the default date format and an abbreviated day-name format (e.g. Fri, 13/03/2026). A color scheme setting is also available to visually distinguish weekdays from weekends, reducing cognitive load for operators whose decisions depend on the day of the week. Settings are persisted in the database.

Fixed an error caused by removing data sources or functions from the Tabular Editor. Deleting entries previously resulted in database referential integrity issues that prevented subsequent model runs. The root cause has been resolved across all affected project types.

Test Coverage Improvements/Changes:

Veneer integration test suite created based on MDBA requirements. A new set of Veneer-based integration tests covering core Source functionality has been implemented, targeting the high and medium priority areas identified during consultation with MDBA. The regression test suite is now live on TeamCity and responds to new code changes in the master branch.

View detailed release notes: 6.3 Beta Release (May 2026)

This version 6.2.0.14258 is a patch to previous Beta version that includes a fix to an issue where input sets loaded via the command line would unexpectedly persist after project load.
Issue: When running Source from the command line, input set cleanup steps were not completed after the project finished loading. Any input set loaded into the project would unexpectedly persist, potentially affecting subsequent model runs within the same session.
Fix: Input set cleanup now completes correctly following project load in command-line execution mode.
Who is affected: Users running Source 5.60 & later versions via the command line with input sets. GUI users are not affected.

eWater is pleased to announce the latest Beta Release of Source version 6.2. Key enhancements in version 6.2 include:

A fix to an issue where input sets loaded via the command line would unexpectedly persist after project load.

Fixed a bug where the Supply Point receives demand during the Order Phase, where Water User functions are evaluated using flow values from the previous time step. Since these functions are not re-evaluated during the Flow Phase even when they depend on Flow Phase variables, the resulting water extraction is based on outdated values and can be incorrect. This was resolved by re-evaluating Water User functions during the Flow Phase at the first connected Supply Point, ensuring that demand is updated using current time step conditions when it is requested.

Applied a change from MDBA relating to the ownership of storage routing links when a division in the link transitions from live to dead storage. Updated regression tests results that were affected by this change.

Added the ability to centrally enable or disable individual constituents in models. When a constituent is disabled, it is ignored during simulation. This feature is also accessible via Scenario Input Sets.

Optimized Function Manager tree performance with lazy loading and resolved memory issues due to referencing functions to support projects with large amount of functions.

Aggregation of partial periods occurring at the start and end of a timeseries due to run boundary dates can now occur. This occurs in-line with reporting of periods with missing data in the middle of a timeseries.

Fixed a bug relating to priority ordering at confluences when upstream branches have different travel times.

Resolved a slow project load time in the .NET 8 version of Source when opening the Barwon-Darling model. Improvements were made to project loading that bring load times in line with the pre-.NET 8 version for that project.

Added a new Dead Storage Volume recorder for Storage Routing Links, which can be used by Context Variables. Enabled the Storage Volume on Storage Routing Links to be used by Context Variables.

Ensured that the "Area Volume Table" option persisted correctly for On-Farm Storages under the Storages > {Storage Name} > Area > {Date} UI.

Fixed a bug where rainfall runoff model parameters did not display "inf" (infinity) when they are large.

Fixed a bug where previously user trying to filter "Subcatchment" columns by Geo Regions could cause an error.

Hidden the "AllowCarryover" checkbox when the user selects anything other than "Water Year" in the Supply Point > Demand Constraints > Usage Limit UI, and persisted the Textbox entry.

Removed the Demand Model > Crops > {crop name} > Crop recorder from the recorder tree for the Irrigator model.

Fixed a bug where the recorders would not update if the recorders had been opened following a run error in the previous run.

Fixed an issue where the Scenario Mass Balance Recorder was not refreshing correctly after each run.

Fixed a bug where Scenario Mass Balance changes overwrote previous run results as well as Latest Run in Results Manager

Fixed a bug that crashes Source while using the Project option “Force Comments On Save”.

Added a configurable base folder path in Results Manager -> Options menu item, enabling Result Manager Configurations to store relative file paths alongside absolute paths for improved portability and easier sharing across different environments.

Fixed a bug where the run progress bar would appear stuck after a scenario run is completed for Replicate Analysis runs.

Marker Routing : Added a new ‘Experimental Feature’ (available under Application Settings) to alter the way Marker Routing information is managed. This work is still in development, and the feature is only intended for specific clients to test with.

Source Performance Improvements : Micro-optimizations were made to the following 4 areas of Source to improve Source run-times: Water User, Constraints, Ordering and Ownership, Recording, and Functions. A ~4% reduction in mean runtime was achieved across the three analyzed models (GBCCL, Namoi, and River Murray 50) through improvements made to several functions identified as hotspots during profiling. These gains were achieved without any major restructuring of the codebase.

Conversion to GUID recorders : Converted the Pipe Junction node's Connections From and Connections To list recorders to the GUID-based system.

River Operations Performance Improvements : Improved run time performance for River Operations by optimizing iteration logic and reducing initialization time. This seems to have a 20% reduction in run time for 'RiverMurrayOps' project.

Fixed a bug in Results Manager where repeatedly clicking on a chart would incorrectly increase the left Y-axis range after manually setting it.

Fixed project summary export errors related to forecast model properties (Trend, Monthly Average, Expression, and Timeseries) that depend on Reflected Items, which occurred when exporting before a scenario was fully initialized.

Fixed an exception that occurred when right-clicking on the Time Column in the Tabular Editor.

View detailed release notes: 6.2 Beta Release (March 2026)

eWater is pleased to announce the latest Beta Release of Source version 6.2. Key enhancements in version 6.2 include: