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Yeah, I was replying to Dave, more or less, so the neophytes in the room would pick up on it. When you override a dimension you have to math the others connected to it and the chances of error are high. Besides, overridden dimensions are camouflaged unless you check the object properties, making them impossible to manage for another person modifying the drawing. I've been doing this since 1971 on the board, 1982 on the computer, 2004 in AutoCAD, and I still feel like a beginner in AutoCad.

@Dana W I wanted to also say that I would never tell someone to do anything to hurt their job or career. Dave did post this: As I said I also taught myself AutoCad. I consider myself pretty good at 2D drawing and have just started to learn 3D. But even I wouldn't think I have the skills to draw a house or building or room. There are just too many things you need to know besides how to draw something in AutoCad or any other drafting program to do this professionally. Dave's post above just made me think this is a personal project he was doing for himself. So Dave if this is for a job....Don't edit dimensions. I would fix the length by stretching it or redrawing it altogether.

Now that I am retired, (or is it untired?) I work exclusively in whiskers.

Seems the error is ATI graphics card/driver related. I run NVidia cards myself and that would be my recommendation for you. Possible fixes, but check with your IT...https://www.guidingtech.com/fix-loadlibrary-failed-with-error-87-windows-10/ https://superuser.com/questions/1516486/windows-10-loadlibrary-failed-with-error-87-on-remote-desktop-session Some YouTube videos available for the .dll repair as well. Some have seen where 2 graphics card were installed causing this error as well.

As Dana suggested, and to reinforce what ReMark said. Should you find yourself working on a drawing, from or by anyone, about which you are curious, the " -DWGUNITS " command is the way to go. Ideally, one should set one's default template to reflect the measuring system and units, in which one typically works. In addition to the issue of Imperial or Metric systems of measure, is the question of what UNITS to work in. Does a value of 1 represent one lightyear, one mile, one kilometer, one yard, foot, inch, one meter, one centimeter, one millimeter...you get the picture. The answer to that question will be supplied by your UNITS value,as you follow the prompts through -DWGUNITS. Save a copy of your drawing, upon which to experiment with -DWGUNITS. Expanding your commandline history window to display about 10 lines will help a lot to understand what is going on in the command. Read the commandline prompts carefully and move slowly through the dialog. If you run the MEASUREMENT command, the commandline response of <0> means you are working in Imperial, a response of <1> indicates Metric. Once you have a completed drawing reflecting all of the values and preferences with which you typically work, use the SAVEAS command, and in the dropdown menu select .DWT, which means you are saving that as a Template, for later use. See the last screen shot. In this dialog you can choose which .DWT to use as your DEFAULT template, every time you start a new drawing, this template will be opened, UNLESS you actively override it and choose a different .DWT.

Yup, the dimension thing works real well when one starts out with the correct drawing units. I agree completely.

If this is an employment situation, overriding or editing dimensions including the dimension scale factor, could have a detrimental effect on your employment status. There is a command, -DWINGUNITS, which can be used to reset or re-scale your entire drawing to the correct units. However, it is important to have some understanding of what the command is going to ask you and what you want it to do for you before you use it. Notice there is a leading hyphen. it is required. Perhaps before running that command, you need to undo whatever you have done to your dimension style, and/or using the command UNITS. Please understand that the command UNITS does not change your drawing units, it only changes the label YOU have given the unit. Perhaps it you upload a copy of your drawing along with telling us what units you want to use, one of us can remedy your predicament for you while explaining how to determine your units and viewport scale up front.

Which AutoCAD template file did you start with? The two obvious choices are acad.dwt and acadiso.dwt? The first, and default, is used for Imperial based drawings. The second is used for Metric drawings.

Here is the procedure in Inventor...https://knowledge.autodesk.com/support/inventor-products/learn-explore/caas/CloudHelp/cloudhelp/2014/ENU/Inventor/files/GUID-E40DAF98-4451-4A4E-A423-1E4365C5A68F-htm.html Your profile shows AutoCAD. For AutoCAD a PLINE can be changed by right-click and choose Arc while drawing.

I think that what you mean is- "Draw a fighter aircraft". Designing an aircraft (or anything else) is a whole different thing involving what materials to use, what engines to use, how to make them, how to fasten things together, when we've done all that will it get off the ground, etc., etc. OK it"s a bugbear of mine; but drawing a pretty picture is not designing.