When trying to use the Hangers tool, and insert a Brace, it only allows for a single brace to be added.
It doesn't allow for continuous insertion as intended. 

After attempting to download the Latest Toolbox, a warning appears saying the file cannot be opened. 
Tells user to delete toolbox .rvt file and try again, but that does not work. 

Greyed out options in the Addin Assistant and ribbons do not appear in Revit

Error occurs when using some commands.

Autodesk has released AutoCAD 2025.1.4 & 2026.1.2 updates which breaks HydraCAD. It includes a major programming change by Autodesk that will require a lot of work and a large update by us. That update is being worked on right now, along with a version of HydraCAD for AutoCAD 2027. All are now affected by essentially the same programming change.

BinaryFormatter serialization and deserialization are disabled within this application. See  https://aka.ms/binaryformatter for more information.

Other commands with this error;

Sprinkler Layout dialog (SL command)

Default Dialog Location (DDL command)

Flex Pipes on Armovers list as TG pipes instead of TT 

Unhandled exception: Input string not in correct format

When opening Hydracad you get the following error:

Unhandled exception has occurred in a component in your

application. If you click Continue, the application will ignore

this error and attempt to continue.

Retrieving the COM class factory for component with

CLSID {44D62FAE-67A7-4131-BF38-489CDFE44738}

failed due to the following error: 80070424 The specified

service does not exist as an installed service. (Exception

from HRESULT: 0x80070424).

Step 1a.6 - attaching nodes Hangs pause pauses locks freezes

If experiencing an issue with HydraCalc Sizer please contact support at:

(603) 434-0502
Support@HydraCAD.com

Error in HydraKEY somewhere...