Labview file corruption
 

I last worked on my high shooter code a week ago and i go to do some fine tuning on it now and when i go to open the file i get a message saying "file or library is corrupt" and i cannot access it. I can manage to open up the vi's separately and when they load up they open up a file explorer tab to the WPI_sonar_MB1010_getrange library. I cannot just use this method to run the robot, when i attempt to it won't let me. I tried just deleting every sonar block in the program to see if it worked, but it still said it was corrupted. Has anyone else had these problems?