Modbus library disappeared

[BeeEyeBye]

I was using the Modbus library and it was going well.  Then one day it disappeared.  I'm not sure what I might have done to cause this.  It no longer shows up under Data Communication.  All of the programs I wrote are un-runnable with dozens of errors because of the missing modules.  Does anyone have an idea on what might have happened or how to get it back?  It came with the DSC module.  Thanks for any help you can give.

[Hooovahh]

There have been several Modbus libraries over the years.  What is the search path that the missing components should be found at?  When it is searching is the path LabVIEW 20xx\vi.lib\modbus?  If so I think those get installed with LabVIEW Realtime as well.  What version of LabVIEW are you using?  I might be able to provide the Modbus files from another install.  Or you might be able to find it in the RT Module, or DSC.  It sure is odd that it just disappeared?