Error 7: File Not Found When Building an Application

Updated Aug 9, 2022

Reported In


  • LabVIEW
  • LabVIEW Application Builder Module
  • LabVIEW Real-Time Module

Issue Details

I get the following or a similar message that says error 7 occured at the following VIs:>>
Error 7 occurred at Copy in AB_CDF_Delegate.lvclass:Copy>>>>> 

Possible reason(s): 

LabVIEW: File not found. The file might be in a different location or deleted. Use the command prompt or the file explorer to verify that the path is correct. 
Nonexistent GPIB interface.


Windows uses a maximum path length of 260 characters. Using a longer path might cause problems. If you encounter the error described above, use a shorter path length of the output directory. For example, a new folder directly on C:\.

Note: This error can also appear if one of the VIs is corrupted. Check and ensure that all your VIs are working properly. Follow the instructions in the article 
How Can I Fix my Corrupted VI in my LabVIEW Project? for more information.

Additional Information

The following article describes how the naming and the path structure in Windows works -
 External Link : Naming Files, Paths, and Namespaces