Error 7: File Not Found When Building an Application

Updated Aug 9, 2022

Reported In

Software

  • 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: AB_Engine_Build.vi->AB_Build_Invoke.vi->AB_Build_Invoke.vi.ProxyCaller:
 
Error 7 occurred at Copy in AB_CDF_Delegate.lvclass:Copy Files.vi->AB_CDF_Delegate.lvclass:Build.vi->AB_RTEXE.lvclass:Build.vi->AB_Engine_Build.vi->AB_Build_Invoke.vi->AB_Build_Invoke.vi.ProxyCaller 

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.

Solution

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

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