When I add a single constraint to an object it locks in into position. Also, non-related constraints are causing error messages (for example inserting a screw is causing an error in a flush constraint in non-related parts). I had issues with this in the previous release of Inventor but have not had a problem with 2011. This problem just occurred today - attempts to delete problem parts and rebuild the assembly does not resolve the issue.
Any suggestions as to the problem?
Solved! Go to Solution.
1. Too much adaptivity - turn as much adaptivity as possible off (unless the latest constraint is supposed to affect it, it should not be adaptive at this time.)
2. Daisy chained assembly - Let's say part A is grounded and part B is constrained to it, then part C is constrained only to B, and D only to C etc. It's got to figure out each constraint and how it affects each other constraint and after a while it just gives up and parts you place don't want to move. Temporarily grounding some stuff near where the new stuff is going sometimes got it to work when I used to have this problem.
Look for a bad contraint somewhere in your assembly. It could be in a sub-assembly as well.
Rather than chase through all the constraints I have decided to rebuild the object (sliding window) in a new assembly (I changed the frame parts to a new profile which created the constraint crash). Now if I add a constraint I cannot move the object, however additional constraints will work to properly align the object. I seem to remember this happening before as well and it was a matter of a setting being changed but of coarse I cannot remember where of if this was in fact the problem. Have you experienced this issue?
Zip and attach your assembly here.
Roll up the EOPs to make the ipts smaller before zipping.
I suspect you should be able to isolate the problem to two or three parts in the assembly.
Attached file. Oddly enough I can't even get the constraints to work on these three pieces even though I had assembled it earlier in the day. All that is missing is a flush constraint so that all the parts line up.
This project seems to be the only one that will not work. Other window (larger) window drawings still work fine.
Works fine here
Problem seems to be rooted in bad frame drawings at the cad level. I redid the vendor drawings by tracing the section outline using P-lines. When these were extruded and imported into the assembly all the previous issues vanished and the window will now function properly.
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