Dear All,I'm new here and need some help. I have problem with my File CAD. When i try to save my file, the size change very big. Example when i open its only 10 mb but when i save it. its turn to 25 mb. Can anyone answer what happen to my file?I actually use a different computer to open that file and my friend also can't open the file if i save it.If i use a computer with a different bit, can it change the file size too?Please help me,Thanks

Hello Rain14, if your friend can't open your file it's maybe because he uses an other AutoCAD release ( AutoCAD2008 and not your AutoCAD 2009 ).
Do you PURGE your files ?
Do you SCALELISTDELALL ypur files ?
If your files are 25 mb it's because of the complexity of them, are they 2D or 3D ?
If they are "only" 2D you could simplify them by using BLOCKs.
If they are 3D you can also use BLOCK.
If you explose 3D or use FLATSHOT you will have to use OVERKILL on the 2D object that you create.
When using OVERKILL you will erase dashed lines in double with continuous lines and I sujest you separating them with QSELECT before.
Tell us it this helped or not.

I think you should take a look at the number of linetypes being loaded.

hello in regards of this tread i have the same problem and i have 8 users under me with the same problemRecently wee aquired new pc's with win8 and also a new server and since then everything i sticky and drawings are almost doubling in size every time we add xref's or other stuff in to themso is there a solution

Got the same problem in one project before but after searching for long time I found the solution to reduce the cad filebut I still have same problem after a while files keep bigger after adding changes & modification ,then I had to go back back to my reducer solution at least it come lower from 10 mb to 1 mb.. step 1:try to save as your file to dxf file lower version note: change the name_ sample 1.dxf (don't panic it will be more bigger)step 2:(PU)Purge your file try to clean it after CTRL+S quick save then close.step 3 : Re-open your file 1.dxf and save it back to the original file dwg name sample 1-project.dwg  PROBLEM SOLVED!!!Repeat the procedure you will notice that from 100% bigger to absolute 20% reduce file .Hope I save your day thanks toCAD Forum...

thanks Mikebut it changer 7.35 mg to 7.29 

If you are going to use the purge command then utilize the command line version which is -purge and purge Regapps first.  Repeat the command, -purge, but this time do a purge > all.  Run an Audit of the file too and have AutoCAD correct any database errors it finds.

Did you check how many linetypes are loaded as I asked previously?Did you run OVERKILL on the drawing?

Yes and it took a 590 overlapping lines so yes ty it took out to linetypes but the dwg is still almost the same sise

send me your file let me check!

OH the one the new machines it as 2015 version, and it as a purge automatically orphan dat check box and now the file whent from 7.28 to 181 kthanks to all

[QUOTE=cadmoffu]Yes and it took a 590 overlapping lines so yes ty it took out to linetypes but the dwg is still almost the same sise[/QUOTE]WBlock out the portions of the drawing you want to keep.Third and last time.  Did you check to see how many linetypes were loaded?  Do any of them have the letters DGN somewhere in the name?

Sorry jcyes there was at least 600 or so  those types of linetype dgn  and we tried a hotfix ddl from autodesk it got ri of those, but not allbut with the automatically purge orphan data box checked in the purge command the files get 10 times smaller that is in version 15 thanks with your patience like i said i have 10 users that i am running all over the place to fix their problems so my responses could seem out of frameHave a nice dayPierre

Finally.  I thought we'd never get there.

Hello Rain14, A few months ago, I've had the same problem. A new empty drawing, was already 7mb big.  I have found an Autocad Hotfix. With this file you need to overwrite 2 files in your Autocad map.After doing this, you can open your big drawing in Autocad. If you use the command "dgnlspurge", Autocad shall delete all the invisible linetypes. The size of the empty drawing of mine wasn't 7mb anymore but 67kb!! I've add the hotfix file included the readme to this post uploads/476408/AutoCAD_2013_2014_DGN_Hotfix.zip 
Sandervp2014-10-30 08:11:44

The linetypes aren't invisible.  They are listed in the LTYPE dialog box.

Dear All,I'm sorry for too long reply all of your comment. I will try all of your comment and i hope it works.thank you very much.

It would take you about 5 seconds to check linetypes like I asked (three times).  I don't know why you refuse to do so.  My participation in this thread is done.  Good luck solving your problem.