I have just lost close to 30 viewports for a job. They are now showing up on the drawings as mostly blank with some having bits & pieces of other parts of the drawing which are not close to where the viewport was taken. What could possibly have happened and is there a cure to get back the viewports. It seems like the viewports originations have shifted on the original database to a different section. I did not (to my knowledge) move the locations of the origination of the viewports, but it seems like they must have all shifted somehow. These viewports were all taken from one section of the database where I drew up a batch of details. I am on windows 7, arris 9.4 latest spin.