18.1 2025.0 Release

Table 18.1 outlines the changes made to the default settings for the 2025.0 release and lists commands to revert the settings to those used by the prior major release group (2023-03). All default settings can be reverted to the prior release by using the command, “Defaults == Pre 2025”. For more information on changes, see the TUFLOW Classic/HPC Changelog.

Table 18.1: Default Changes in the 2025.0 Release and Backward Compatibility to 2023-03
Description Backward Compatibility Command
Reset all defaults to that used by the 2023-03 release. Defaults == PRE 2025
The format of a TIN written when the WRITE TIN command is used with Z Shapes or write TIN commands was changed. The new default (2DM) writes the TIN using the SMS 2DM mesh format, which can be read in by QGIS and SMS. The previous default (SMS TIN) wrote a TIN that could only be read by SMS. TIN Output Format == SMS TIN
The default value for the HPC HQ Boundary Filter Constant has been set to 5. This can provide improved stability for HQ boundaries. For backwards compatibility, set this to 1. See Section 8.2.2.2. HPC HQ Boundary Filter Constant == 1
Internally, HPC multiplies the Nu, Nc, Nd control number limits by a dynamic control factor. Method A considers that a high control number step has occurred if any of Nu, Nc, Nd has exceeded the dynamic control number limits (i.e. after the dynamic control factor has been applied) by the 20% margin. Method B (the 2025.0 default) applies the test using the original static limits (i.e. before the dynamic control factor has been applied). For more information see Section 3.4.4. HPC Timestep Approach == Method A
A CHECK option has been added to the HPC DP Check command and set as the new default. This downgrades the previous default from ERROR. For more information see Section 13.3.2.2. HPC DP Check == ERROR