Sometimes you find you can’t get the information from your Vectorworks file, or the file might seriously misbehave. I have a possible solution. This works most times, but not always. If this techniques doesn’t work, there is nothing else you can do, you have to go a backup copy of your file.
The way this technique works is that you create a link from the old file to a new, clean file using Workgroup Referencing. Then when you break the link all the linked information stays in the new file.