Free Drag of Parts or Assemblies disables itself

[panzilte]

Has anyone else come accross this problem while working on an assembly? One
places a component in an assembly, it could be a part or a sub-assembly, and
then attempts to use the free drag to move the newly placed component. It
has not been constrained or grounded, Inventor seems to freeze not allowing
one to move the conponent. The move command works but the as soon as one
re-builds the assembly the moved part or assembly goes back to it's previous
position.

What could the problem be?
Is there a fix?

other info
OS: Win XP
Proceesor: 3.06 GHz
Mem: 1.5 Gb
Vid Card: nVidia 980 XGL 128 Mb
Inventor 9 SP 3.0
Small Assembly with 4 sub assemblies and aprrox 50 parts
Single User Project

[jonathan.landeros]

Panzilte,

I don't recall R9 ever doing that to me.

I know you say there are no constraints but the behavior you're describing (works using move command and snaps back during update), sounds like what would happen if a constraint were in place. Is there any chance that an extra constraint, like an I-mate may have taken place, or that create constraint during part creation box may be checked, placing constraints without your permission?

Jonathan

[panzilte]

I was posting to help a co-worker...so I could have been mistaken about the snap back after rebuild. There are no iMates. It is almost like Inventor treats the part as if it where grounded or completely constrained. I also posted this on the other Autodesk forum and other people have run into this situation too.

[jonathan.landeros]

I'm afraid you've got me on that one. I've never seen my installation do it, so I'm not sure what could cause it.

I once ran Inventor with an on board video controller on a dumpy laptop, and that would pause for 5-10 seconds sometimes as the video controller got rid of the sheer shock of what it was trying to do. But eventually the part would move, and it wouldn't move back on an update or rebuild.

Sorry I couldn't be of more help.

Jonathan

[robert.templeton]

Here is another condition to consider. When your assembly has a constraint that has an error, Inventor will not resolve the position of the other parts correctly; parts will jump back to their previous positions. If you go into Modeling View, you can scan the list of constraints.

Have you seen this problem with other assemblies, or just one assembly?