Software Patches

April 10, 2026

Bug Fixes

  • Oneline Diagrams: When loading an AXD file that had been saved using labels identifiers, some object types were not loading back in properly. This includes any display object, field, pie chart, or geodataview that was linked to the following object types: InjectionGroup, Area, Zone, InjectionGroup, Interface, SuperArea, and Owner objects.
  • Scheduled Actions: Improved error reporting of Outage CSV files loaded with no data.
  • Transient Stability: Added Delete button to the Modal Analysis Dialog to delete all the modal analysis data.
  • Transient Stability: Fixed a bug that was preventing using the REGFM_A1 and REGFM_B1 transient models with the REPCA1 and REPCTA1. This was fixed.
  • Transient Stability: Removed restrictions inside PowerWorld Simulator regarding REPCA1 and REPCTA1 plant controllers are connected to a particular type of machine model. Within PowerWorld Simulator, there is no difference between the REPCA1 and the REPCTA1 model. If a Pref controller (Torque controller) is defined for the generator, then the plant controller will send the P signal to it, otherwise it will send it to the electrical control (REEC_*). PowerWorld determines this automatically. Older restrictions where only added for ensuring compatibility when writing a DYR file however. When writing out to a DYR file PowerWorld was checking and writing out what is required in that format already, so no need to add restrictions inside PowerWorld.
  • User Interface Dialogs: Fixed bug when using any option other than All when selecting the Lines to Process when using the tools to determine the path distances between buses or shortest path between buses tools.