HydraCARDs | When opening AutoCAD, usually after a fresh install, you're greeted with this error message' <img src="https://hydracards-storage.s3.amazonaws.com/media/public/uploads/2021/08/11/image.png" style="height:143px; width:384px" /> InstallPath registry key not found. HydraCAD must be re-installed using the current profile. Defaulting to C:

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AutoCAD Based Launching HydraCAD (Ribbon/Toolbar/Location)

Error Type: InstallPath registry key

Description:

When opening AutoCAD, usually after a fresh install, you're greeted with this error message'

InstallPath registry key not found. HydraCAD must be re-installed using the current profile. Defaulting to C:

Cause:

Unknown, but the proper registry entries were not created during the install

Solution:

Even though HydraCAD was properly installed to the C:\ drive, the registry wasn't built properly.

This Key and String are missing.

In the registry editor go to the below path and correct the Install Path by right clicking on it.

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\HYDRATEC\

Updated: Aug. 18, 2025, 2:55 p.m. Created: Aug. 11, 2021, 3:03 p.m.