Unable to select ceiling grid intersections when using Align Crosshairs with Ceiling

Autocad variables align x hair w\clg 2013

When setting up a new head, the dialog that displays the head symbols to be selected appears, is empty, and then drawing crashes,

During the HydraCAD install, you get an error saying, "InstallShield Wizard - Unable to find HKEY_CLASSES_ROOT\.DWG registry key.  You may need to repair AutoCAD or reinstall it

1. Missing profile 2. Bad registry entry 3. User does not have Admin privileges Unable to find profile Installation Acad 2015~

When raising to 3D, you get the error message, "Error loading the Error GUI has occurred.  How ironic."

The drawing will raise to 3D, but you won't see the error dialog window.

Trying the Show Model Errors command (SME) produces the same error

Error occurs when using some commands.

Autodesk has just released AutoCAD 2026.1.2 - and it 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. Both 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)

Trying the DDL command gives the error; 

Usage: (acad_strlsort <list of strings>)

Error bad argument type: consp nil

When importing a Persistent Model into Revizto, none of the riser nipples are visible

During the install of HydraCAD V56/57/58, the user is greeted with the message below.  Following the both sets of instructions of opening and closing AutoCAD, and running a repair of AutoCAD do not make a difference.  You'll still get the error message.

V56 = R23.X
V57 = R24.X
V58 = R25.X

V57 install will say;

Neither AutoCAD 2021, 2022, 2023 nor 2024 found (missing registry key:

HKEY_CURRENT_USER\Software\Autodesk\AutoCAD\R24.X).

Please install it before re-running this install

When opening HydraCAD, you only receive this error message and not a HydraKEY error with the golden X.  If you receive a HydraKEY error, search for the linked HydraCARD in that message box as it takes priority.

Security Error: One of the following conditions is possible

HydraCAD is unable to function under these conditions.

• Lock database needs updating in HydraKEY
• Accounting flag on your account
• Hardware lock not plugged in
• Extra ACAD.RX file found in folder in Support File Search Path
• Sentinel driver is missing
• InstallPath registry item set to wrong drive

After AutoCAD opens, press F2 to view the command prompt, see if the text below appears.  If yes, see solution 1.

Could not find file HCAD_ENV.INI

Is 2024; error: no function definition: PRINTEM

When the OK button is clicked from the AutoLIST Setup window, it'll either hang/freeze or crash with a Fatal Error

Unhandled e0434352h Exception at 25CE17Ah

When raising to 3D, the drawing hangs.  On the progress bar at the bottom, it may be stuck at, "Creating entry for mains database"

If you turn off the Show Fittings in Model option found in the 3D Modeling Settings window (3MO command), it likely will create a model.

The only option is to End Task AutoCAD to stop the process.

When attempting to open HydraCALC Sizer, you get this error;

Error:260:0:0

"Well this is new, not sure what's happening with your hardware lock, please get a current 'fix file' from Hydratec"

Upon starting the Show 3D command (S3D) the drawing immediately switches to SE isometric, reports no errors but no 3D piping is visible.  Even newly drawn pipe won't elevate.

Drawing successfully elevated to 3D. No errors were found

Related HydraCARD: #853

https://hydracards.hydratecinc.com/cards/card-853

Call from AutoList::AddLineItemsToDatabase DAO Error changes requested to table not successful - create duplicate values in the index, primary key.... The line it failed to write is logged in C:\HES\TEMP\DAOUpdateError.txt Also: DAO Server Error RSU Update Call from Autolist DAO Error

When using the Figure Head Area tool, you get this error

Error during APQ insert - Microsoft VisualBasic ErrObject

Error during LoadAPQFile - eFileNotFound

Error during InsertAPQandTEXT

Step 1a.1 - Error Box - User ID Duplicated

Transfer to HydraCalc - Step I1a.10 System is now 'Attaching Node 2 Elevations error occurs, please report both the step number and the step description to support! Error Display Error Type User ID Duplicated Step Ref 1 Ref 2 Ref 3 I Ref 4 1a.1

When viewing a plot, hydraulic reference points in the HYD2 layer have thick text.  Editing lineweights for the layer does not make a difference.

Double-clicking your HydraCALC icon makes nothing happen.  You do not see HydraCALC open onscreen nor on your taskbar.  HydraCALC does not open other than in the task manager.

If you open your task manager and see the app "Hyd_prog.exe" open but not on your taskbar, then the application is stuck in purgatory.

Another possibility may be that it's on the taskbar but not on your screen.  That means it's open but offscreen. 

See this HydraCARD to fix that issue;  HydraCARD 565 only AFTER you've checked on the solution below.