Changelog for TUFLOW 2025.2.1

Release date: 24 September 2025

  1. General Notes
  2. Backwards Compatibility
  3. Bug Fixes
    1. Boundaries and Links
    2. Outputs and Check Files
    3. Other

General Notes

The 2025.2.1 is patch release for TUFLOW 2025.2. This release fixes several bugs related to boundaries, messaging, and the new mathematical operations’ functionality. For more details and a complete list of bug fixes, see the Bug Fixes Section below.

Backwards Compatibility

It is not expected that the 2025.2.1 release would cause changes in results if upgrading from any of the prior 2025 releases, except for the specifics of the bug fixes listed below.

Bug Fixes

  • Fixed an issue with the TUFLOW HPC / FV interface cells in a TUFLOW CATCH model which could cause the groundwater to be drained too fast from the HPC model. Zero groundwater depth was being applied at the interface cells, which could generate an artificial drawdown of the groundwater level. A “free outflow” boundary is now implemented at the TUFLOW HPC / FV interface, where the gradients of groundwater velocity and groundwater pressure level are assumed to be zero. This type of boundary allows groundwater to flow out of the model ‘freely’ without causing artificial drawdown or blockage.
  • Fixed an issue in TUFLOW HPC where cyclone boundaries were not being updated if the HPC Cyclone Boundary Update Interval command was not present. Without this command, the centre of a cyclone stayed at the first vertex of the 2d_cyc polyline. After the fix, the cyclone will now step from vertex to vertex along the 2d_cyc polyline. However, it is strongly recommended to use the HPC Cyclone Boundary Update Interval command in order to update the cyclone location smoothly.
  • Fixed an issue where reading boundary condition curve data from HEC-DSS Boundary Files was generating incorrect boundary curves. The bug was introduced in 2025.1 and appeared to apply to all curves read from a HEC-DSS file, incorrectly generating a simple increasing curve.

Outputs and Check Files

  • WARNING 2386 is now generated if the Map Output Data Types included the RC type when using the HPC solver. Note, that evacuation routes in an HPC model supports the _RCP GIS output, but the RC map output is currently only supported in TUFLOW Classic.

Other

  • ERROR 0053 is now generated if a file read by the Read Restart File command does not have “.trf” extension.
  • Fixed an issue where variables defined in event files were not seen by math operations causing TUFLOW to give an error.