Thank you for your attention to this matter.My lines are not meeting each other. They are off by 0'-0." The angles are off by decimals, i.e., .04 When I try offsetting a straight line - the perpendicular lines don't meet, and are off by 0'-0" I tried flattening drawing, regenerating, setting my ucs, the hardware acceleration as seen on other posts and attempted changes to the snap modes, and even changed the computer.Can anyone help me please?! 

Hello efa, are you working in 2D with lines coming from 3D exploded solids or 3D lines that maybe "rotated"?Are all your entities at Z = 0 ?What do you mean by "not meeting each other" : no TRIM, FILLET or CHAMFER available ? 

Off by 0'-0" is not off.  Can you explain differently?  Can you post a drawing?

We work in 2D and drew it from scratch, so there shouldn't be 3D lines, unless we could've drawn on a 2D drawing in 3D without noticing- we work with standard 2d.The trim, chamfer, fillet- would be if we had to cut the line- but that doesn't seem to be the problem anyway. I hope to attach a drawing on Thursday. Thanks for your time and attention to this matter.

Thank you. I hope to post the drawing and another differing explanation on Thursday. Thanks for looking into this for us!

Type Units in AutoCAD and increase the Precision to maximum number displayed there in the drop down. Now check the Distance between the lines (using "dist" command) that you believe are not "meeting". Press F2 and copy the steps and paste here for us to understand what's going on.

Did you use your OSNAPS when connecting one line to the other?  Check the setting of the ELEVATION command.  Is it set to zero?