If you open a drawing file in DWGSee and it pops similar message as shown below, then you will need to manually load the Xrefs in DWGSee as without the Xref’s the drawing on screen is not complete.
Go to “Options” > “Xref Manager”, you will find all the referenced files in the “Xref Manager” and the status is “Not Found”
Option1. Put the drawing together with all the external references drawings.
Option2. Choose every reference file in the list and click “Browse” to re-locate the reference file.
When the Xref file is selected, click “Save Path” to update the status.