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

Autocad variables align x hair w\clg 2013

Step 2.3 - After one pass through calculations Miscfunc hangs....

Also possibly "Hydraulic Engine not responding" and a "Runtime Error 62 input past end of file"

When starting AutoCALC, it stops in the v50 Fuel Gauge at step 1a.4 - Calculating Total Lengths. 

Working on the pipe from node #### to node #### with a fitting string of ...

May be followed by a Runtime Error 13 or Runtime Error 5

Launching AutoCAD causes a hard system crash as it loads some HydraCAD plugins, the last one seen is HCADMainBase.arx. The machine crashes every time — it does not reach the AutoCAD interface. When HydraCAD is uninstalled, AutoCAD launches and runs normally with no crashes.

You are not currently authorized to use this Hydratec Product.   Lack of authorization.

When placing clevis hangers or adjustable ring hangers on a 10-inch pipe drawing in Revit, the hangers render incorrectly with missing 5/8 rods.

When trying to add reference points, none are added and this error shows:

Revit could not complete the external command... Object Reference not set to an instance of an object.

Hanger Assembly dropdown list is incomplete. 

After inserting a valve, it does not appear in the 3D view. There is blank space where the valves should be. 

Trying the SAVE or QSAVE or SAVE AS command in AutoCAD fails

"One or more objects in this drawing cannot be saved to the specified format.  The operation was not completed and no file was created."

When printing final, your outside hose demand after the pump isn't included in the total flow.

In the example above, the system demand is 1274 gpm is represented by point D2/D3.  The outside hose adds up to another 250 gpm but there isn't another marker at 1524 gpm

*Please note, while the Demand summary at the top shows D3 as a point, since D2 and D3 are the same value, the graph will only show point D2.

Primary calc results are shown, and when selecting OK to continue back to the calc input screen, the two messages below are displayed, twice;

"The designated source node was not found in the list of pipes" OK

"Calculation failed for an unknown reason" OK

Process Error Hydcalc

When trying to insert a valve type fitting from the parts tree, you get the error; 

Still!!! Block ### is missing.  Please insert manually.

However checking the database for the drawing file shows it exists.

All building dimensions are inserted into an different layer than the current one.

No connectable heads found within distance specified for the line

illustrated, or heads were already connected ...

No connectable heads message comes up, even when there are obviously heads that can be connected. Can also be error stating Please re-select line away from other lines

In Navisworks 2024.2 to Navisworks 2025.3 (possibly a sub-version earlier or later), Properties for appended HydraCAD persistent models do not appear, and a Proxy Object notice is given.

"AutoLIST Failed!... Please run Listing CheckUps"

This message is shown when running the AutoLIST process, but checkups didn't find any errors AutoLIST Failed

When opening HydraCAD, you get this error

Unhandled Exception...DAO32Server...