topic Why Doesn't AutoConstrain Fully Constrain The Block? in Dynamic Blocks Forum

Why Doesn't AutoConstrain Fully Constrain The Block?

Jason.Piercey — Fri, 26 Mar 2021 13:43:06 GMT

Like many others I'm getting the "not fully constrained" message when exiting the block editor. I'm aware of the BCONSTATUSMODE system variable but that isn't exactly super helpful. If a block not being fully constrained is THAT big of an issue (yes, I'm aware they can react in a quite bizarre fashion) why doesn't using AutoConstrain solve the issue(s)?

I've been able to solve the issue with some blocks by adding a "Fix" constraint but that evidently isn't the solution for all instances. AutoConstrain often results in this message: "select objects or [Settings]: 0 constraint(s) applied to 25 object(s)"

Edit: Using AutoCAD 2021 here

Betreff: Why Doesn't AutoConstrain Fully Constrain The Block?

peter_petershagen — Tue, 13 Apr 2021 13:34:12 GMT

Hello Jason!

"Why Doesn't AutoConstrain Fully Constrain The Block?" - the AutoConstrain command applies pre-selected geometric constraints to the selected objects. With CONSTRAINTSETTINGS / AutoConstrain Tab - you can select geometric constraints and the order they are applied to the objects:

https://knowledge.autodesk.com/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2021/ENU/AutoCAD-Core/files/GUID-61E10B9D-71D5-45E7-AF97-F0884B75930D-htm.html

"AutoConstrain often results in this message: "select objects or [Settings]: 0 constraint(s) applied to 25 object(s)"" - if the selected objects already have the pre-selected geometric constraints than no other geometric constraints are applied.

You may apply dimensional constraints and one "Fix" constraint to get Fully Constrained Sketches !

Because "Constraints Within Dynamic Blocks" is a wide field here are some Links:

https://www.augi.com/articles/detail/tipniques-parametric-constraints-in-dynamic-blocks

https://forums.augi.com/showthread.php?158953-AU318-1-The-Power-of-Constraints-Within-Dynamic-Blocks

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwio7deZqfvvAhV4hP0HHQcAB5gQFjAAegQIBhAD&url=https%3A%2F%2Fforums.autodesk.com%2Fautodesk%2Fattachments%2Fautodesk%2F154%2F15712%2F1%2FDynamic%2520Constraints.pdf&usg=AOvVaw2BinuFFSL1IsKEBZd5wvnJ

HTH Peter

Betreff: Why Doesn't AutoConstrain Fully Constrain The Block?

peter_petershagen — Wed, 14 Apr 2021 11:33:55 GMT

P.S.: This is a Link @ Autodesk University 2012 - Parametrics Master Class
Video / Presentation / Handout / Downloads:
https://www.autodesk.com/autodesk-university/class/Parametrics-Master-Class-2012

Handout Page#17:

Constraints in Dynamic Blocks