Parts of my drawing vanish

[Anonymous]

Hi,

I'm trying to draw a couple of things fore a college project, but have hit a major problem.

When I open a drawing, the preview window shows a complete drawing made up of several parts, but when I open it, parts of the drawing have vanished.

See the picture of the drill in preview,

But when I open it, this happens.

All the layers are visable and unlocked.

I thought this was a one off, but The same thing happened on a second drawing after I saved and re opened it. I would appreciate some help on this, as Its going to make my life very difficult in doing my assignments.

Thanks.

[hmsilva]

The preview is only a raster image snapshot from the last time the drawing was saved.

Probably existed some system failure, and the dwg has not been saved properly (just a guessing), I saw the srill 2 _recover at the image...

You can try the drawingrecovery command, to get the last saved file (.dwg, _recover.dwg, .sv$ or .bak).

HTH

Henrique

[ScottHodges]

Have you changed the location of xrefs, or their pathing, such as changing the directory of either the parent drawing or the xrefs. I'm assuming you are using xref components here.

[nestly2]

Welcome to the Autodesk forums.

The preview pic is just a static (png) image from the last time the dwg was sucessfully saved.. it doesn't necessarily indicate the actual contents of the dwg file.  The "_recover" file in your screenshot indicates that you may have had an AutoCAD crash... did that corrospond with the missing objects?  Are the missing objects present in the _recover file? 

Based on you screenshots, you should have at least these 3 files on your hard disk;  sdrill2.dwg, sdrill2.bak, sdrill2_recover.dwg

To give yourself the best chance of recovering your work,  I would make copies of each of these files and put them in a secure location.   After you have copies of each, I would try opening them in order from the most recent to the oldest and see if all the objects appear after running RECOVER and AUDIT commands.  (BTW, you will have to change the file extension of the bak file before opening it, I suggest something like sdrill2bak.dwg)

[Anonymous]

Thanks for the replies,

Autocad did crash on me, but I'm not sure that was what caused the problem. The second drawing I mentioned did the exact same thing with parts missing, but there was no crash or recover. I just saved my work then re opened it later with pieces missing.

I tried recover and audit, which didn't work, and opening up the bak file with dwg as a suffix, the message just said unable to find file, please verify file exists.

I can live without recovering the drill, but I would like to know why it doesnt save completly, as I have other drawings to do and cant keep losing hours of work.  

[pendean]

Post a DWG, let's all have a look at the missing drill parts file for example.

[Anonymous]

Ok, see attachment.

[pendean]

There appears to be nothing wrong with your file at all: it has a couple of anonymous blocks in it but otherwise whatever used to be there is no longer there.

I did notice the base is a dynamic block: was the body as well? Did you crash while in BEDIT perhaps?

[Anonymous]

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@nestly wrote:

The "_recover" file in your screenshot indicates that you may have had an AutoCAD crash... did that corrospond with the missing objects?  Are the missing objects present in the _recover file? 

I think it did correspond, but the recover file still has missing parts.

Like I said, it happened a second time, with no crash involved. This drawing of an adjustable spanner shows the two parts in preview.

 

But the same happens when I open it, in this case the largest part has dissapeared.

I was hoping this was just some setting I had, but it might be a problem with my autocad. I'll try reinstalling it, and hope it saves properly in the future.

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[Anonymous]

The body was lofted down a series of 2d shapes. 

I'm not sure what the crash did to the first drawing, but the second example did not involve a crash. Thankyou for your help but I think I'm going to have to try drawing more things and hope they save.

[nestly2]

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@pendean wrote:
There appears to be nothing wrong with your file at all....I found 2 "solids" in the dwg that aren't visible.  I was only able to select them via Select/QSelect, but they're still not visible.

Unfortunately, I don't have a solution, but I have seen others who have had 3D objects "disappear" in 2013-2014 as well.