If you are using a Network Drive:
This issue could be related to the way LabVIEW handles errors when reading from a network drive. This can be avoided by ensuring that all file operations during the save take place only on local hard drives. Follow the procedure below to solve the issue.
- Copy the entire folder hierarchy to a local hard drive.
- Open the local copy of the top-level VI to be saved.
- When saving to the previous version ensure that the VIs will also be saved on a local hard disk.
- Copy the newly created folder hierarchy to the desired network location.
Saving for a previous version of LabVIEW is a lot more complicated internally than saving a file to a different location, so duplicating the files may work even if saving for a previous version does not.
If you are using a Local Hard Drive:
This could be related to not having enough user permissions in Windows. If you are unable to access administrator rights due to local restrictions, try using other computer that you have all the Windows administrator rights to save the LabVIEW Project or VI to a previous version.
- Run LabVIEW as administrator
- Save the project or VI for a previous version.