I have been having problems with xrefs not loading in 2013, they are "unresolved" or "unreferenced". This is not an issue with any other version of AutoCAD. the link below is from the Autodesk forum where we ran some troubleshooting, but didn't find an answer. Is there a hidden system variable or something?
Autodesk Product Support's Troubleshooting Request:
From your screen capture, there are at least two DWG references which did get loaded, and some image references which also resolved. This brings up a few questions:
Are the DWGs which are not resolving located in the same directories as the DWG and image references which are loading?
Are the DWGs which are resolving a different DWG file version (2004, 2007, 2010, etc.) than those which are not?
Are the external reference files located on your own hard drive or are they on a network share?
Are the external references relatively pathed or full pathed? You can tell by selecting one in the External References palette, and then look to see if the "Saved Path" starts with a ... or with a \\ or drive letter. If it's ... then it is a relative path.
As a test, try copying all of those reference files and paste them into a local folder on your workstation which also contains the parent drawing, 12010-A1.dwg. Then, close AutoCAD, reopen it, and open 12010-A1 from that local directory and see what happens. Please answer the above questions and post the results of the proposed test in this thread.
Autodesk Product Support
My Troubleshooting Results:
1- Yes “12010-TB’ is the dwg title block located in the job folder… which our company keeps all dwgs for each job in the same folder.
2-No, all dwgs are saved to same format (2004)
3- All the files are on the same network drive
4-Both, see the attached images showing the two different “path” methods with the same result. (The title block “12010-TB” that is loaded is full path “f:\drawings\etc\etc....”)
Test Method & Results:
1- Copied all dwgs from job folder 12010 into a local C: folder
2-Closed, reopened AutoCAD 2013; opened parent dwg file “12010-A1.dwg”
Result: xref paths are still looking to the original folder on the network (which is F: drive)