Additional Information
Certain circumstances, such as upgrading a VI to a newer version of LabVIEW, will lead to this issue. It is recommended for a VI to be recompiled at its first load. LabVIEW continues to recompile the VI each time the VI loads until you save the VI. If you expect LabVIEW to recompile many VIs on load, you might want to compile and save all the VIs at the same time to avoid these tasks at a later time. When you simultaneously compile and save a collection of VIs, you are mass compiling the VIs.