Not everything in a drawing is visible entities, sometimes its data. If you've already tried the stupid-question stuff (frozen/off layers? Text without contents? Zero-length lines?) then its time to start reviewing the data in the drawing. This includes:
Annotation scales: do you have excess scales? Have they been added to every single annotative object?
Groups: are there groups with no objects?
REGAPPs: usually not a *huge* problem on the scale you describe, but a few thousand can take a noticeable amount of file size.
Rogue data: applications, particularly AutoCAD verticals in the AEC family, can add extra data to drawings to support XREF'd or inserted components. These can be *very* difficult and occaisonally dangerous to remove, using tools for manually deleting data dicitonary (not spelling dictionary) objects.
Wblocking out of the drawing doesnt work, the drawing crashes. Deleting everything in the drawing,then doing a CTRL + A to confirm theres nothing in the drawing followed by a purge still leaves me with a file size of 16 meg, there is something wrong with the drawing.
The intent of exploding the objects was to remove nested and anonymous block references and any 3d, a normal purge wouldnt do this.
The intent of reducing the size was so our guys using CAD duct could import the file and draw their model over it. It transpires that using this file has corrupted their model, this might mean a redraw but more importantly it means finding out what the problem is and preventing it happening again.
When you delete everything does 'List' show up anything, or try saving as DXF. A dxf file can be opened in a text editor and might show up something there. Other wise try and upload the file to a file sharing site and post the link, then someone could take a look.
List doesnt show anything. I've tried dxfing it but it creates a 90meg dxf file which I can't open! Redraw it is then! Thanks for your suggestions guys, much appreciated.
2 more things to try after you AUDIT the drawing:
1) XREF the drawing into a new drawing and then BIND it into the new one and give it a new name.
2) Insert the drawing into a new drawing as a block
>>>...exploding the objects was to remove nested and anonymous block references and any 3d,...<<<
I suspect you may have created that monster while trying to "fix it", and now you are stuck no being able to mvoe away from the resulting mess.
Go back to the original file:
- use FLATTEN then PURGE.
- use -EXPORTTOAUTOCAD command (there is a dash in the name) and knock the file down to R14 format. This creates a new file.
- open this new file and explore using FLATSHOT or VIEWBASE commands to truly create 2D from any 3D content. Purge, Audit and QSAVE this file (in any format DWG you want, it doesn't matter now as long as you know newer is always smaller).
- WBLOCK out to a new file by selecting the content you need manually in modelspace (CTRL+A is not the way to do it).
- Now you've got the smallest DWG file possible.
Again, if it's not small enough you need to ERASE content, or if you insist on redrawing you can too.
It was 16meg prior to exploding everthing, when exploded it increased by about .5 meg, then purging and cleaning got it back to more or less the same size prior to exploding everything.
i did flatten and purge the original and checked everything for z values, apart from 10 3d faces ( which I then deleted) there was no 3d in the drawing.
Exporttoautocad resulted in a crash, file converting to 2007 didnt change anything.
Saving as a dxf creates a 92meg file.
Erasing everyhing and purging does not change the size of the file.
Just some random thoughts.....
If you are able to create a DXF of the file (92Mb) can you copy the objects from the DXF to a new file?
One method of copying your work might be to block your entire drawing and export the block through Design Centre.
If so what size is the new file once you have copied all your objects to it? Once there as Dean said can you WBLOCK out of the drawing to compress your work?
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