Autocad seems "jumpy" and the screen occasionally flickers.  Sometimes, an in-progress command will cancel out when the screen jumps

Customer reports that when trying to move an object by exposing the grips, the process takes a very long time and almost seems like AutoCAD freezes.

"Clicking blocks and dragging by node, doing pipe sizings, etc..."

Error Releasing Cloud Subscription from server:

<A SPECIFIC ERROR WILL DISPLAY HERE>

Released Cloud Subscription on server: (<SUBSIPTION NUMBER>) but failed to release it locally.    This is likely due to decreased privleges to your registry on this machine.

Failed to paint the grid due to corrupt subscription Data.

Revit could not complete the external command... The 3D view ownerDBViewId is not locked

Error placing Reference Points or Demand Area annotation... The 3D view ownerDBViewId is not locked.

This job has gone 200 or more passes without balancing.

When trying to install HydraCAD, you get an error;

HydraCAD Version 58 must be installed on this computer before running this update.  Please download and install the full install of v58.

When hitting Save, Refresh Drawing or Calculate Results, user gets a Run-time 9 error. AKA Subscript out of Range

When opening AutoCAD, you get an error saying "a software problem has AutoCAD to close unexpectedly"

Upon reviewing the file it's crashed on, it shows HCAD_MAKEFIGHANGERLIST as the culprit

Revit could not complete the external command... Curve length is too small for Revit's tolerance

HydraLIST completes listing process, but will not open.

Continue button is Grayed out, and I cannot proceed with my calculation.

No Ribbons / only the HydraCAD Ribbon appears, and no commands work.
Revit could not complete the external command. Could not load file or assembly. The system cannot find the specified file. 

When trying to open a calc job using [File|Open], you get a Run-time error '62': Input past end of file

When selecting Adjustable Ring Hangers for pipe sizes larger than 8" the detail does not show.

While in your viewport, your riser is visible while in the 2D Wireframe view.  However if you change the Visual Style to Conceptual or Shades of Grey/Shades of Gray, your 3D riser disappears.  You may notice if re-appears if you zoom out.

After printing your data in HydraLIST, when HydraVIEW opens you attempt to change the default printer. 

You get an error "Page Setup - Unknown filetype found 'HLTF'"

When opening HydraCALC SIZER, you get the error;  Run-time error '53': File not found