Autodesk Inventor

[#1]

So all of a sudden my sketch behavior has changed and I can't firgure out why.  So here is what's happening:

1)  Sketch lines are not being constrained to each other. 

2)  The center of a straight line no longer marked with a green dot (when I hover near it).

3)  Extruding is a problem.  Open loops are found in simple sketches.

4)  Sketches are being created as adaptive.

I went into application options and setting and tried to see if anything had changed but I couldn't see anything different.  The only thing that I had done different in the last day or two was copy an AutoCAD sketch and paste it into a new .ipt file. Other than that, nothing else is different.  This is very confusing.  Does anyone know why this is happening?  I must have zigged when I should have zagged?  Help!

Thanks.

[#2 · Accepted solution]

Have you check the Constraint options?

[#3]

Let me guess (since you left out this critical information), you are using 2010 and clicked Constraint Persistence (thinking it was Perpendicular constraint) and turned off constraint persistence.

Never mind, I see you are using 2013 http://forums.autodesk.com/t5/Autodesk-Inventor/Inventor-2013-crashes-during-break-out-view-creation...  or are you?

[#4]

I think that was it.  I don't remember un-checking them.  Wierd.  Thanks.

[#5]

Oops.  Yes, 2013.  I think jletcher answered it.  Thanks!