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You might try the DGN Hotfix that was released earlier this year. Files with Microstation content sometimes bloat and the linetypes cannot be purged by typical file cleaning methods.
Here is a link to the Hotfix if you're using 2013 or 2014: AutoCAD DGN Hotfix (2013/2014)
Here is the link if you're using 2012: AutoCAD DGN Hotfix (2012)
Are you certain that the "extraneous" linetypes and text styles are unreferenced? Revit exports often end up with linetypes and text styles with non-AutoCAD-standard naming, but which are, in fact, used in the exported content. After you tried deleting all of the content, did you then purge all block definitions and dimension styles, or did you just try to immediately purge the linetypes and text styles. Linetypes and text styles referenced by objects in a block definition or a dimension style will not be purgeable until the referencing objects are purged.
hopefully the file attached this time. after i noticed the extraneous stuff, i tried to find out what was inserting the linetypes and text styles, but was taking too long. so i started deleting in large fences and wound up deleted all. I then purged all but the linetypes and text styles were still there. seems like it was embedded in the file.
In that case, perhaps the DGN hotfix will help.
just seeing if it will post the drawing file
This post did not have an attachment, either. There have been reported issues with being able to make attachments in the recently updated Discussion Groups. Specifically, if AddThis.com is blocked, certain functions do not work properly, including file attachments. The Autodesk team responsible for the Discussion Groups is aware of the issue and is looking into solutions.
Yes, the DGN Hotfix works for all versions of AutoCAD (core, Architecture, MEP, etc.). Have you tried it, and did it help purge the extraneous content?
If not, I'd like to take a look at the file to assist you further. We can try one of the following options:
1. Host the file using a utility like Dropbox, and paste the link to the file here in the forum.
2. Send the file to me in a private message, which might prove more successful than trying to post it in a message here.
3. I can open a case for you through your Subscription Center account, where you can attach the file and we can resolve the issue via a 1:1 case.
Let me know what you'd like to do, and I'll be happy to assist you.
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