Hydratec Inc.

Need to save a card for later?

Create a bookmark folder in your browser of choice (Chrome, Firefox...), and save individual cards in your bookmarks to view here later.

AutoCAD Based Launching HydraCAD (Ribbon/Toolbar/Location)

Description:

Windows 11 Smart App Control is blocking HCADLoader.arx because Windows says it cannot confirm who published the file. HydraCAD then gives Security Error and fails to load its functions. 

Solutions:

Cause:

arx files are not digitally signed.

Solution:

Install Version V57.09 or V58.03 or newer.

Turn off SAC for now.

Updated: Sept. 1, 2026, 4:05 p.m. Created: Sept. 1, 2026, 4:05 p.m.