Error 1556 the Reference Is Invalid in LabVIEW OOP Executable

Updated Nov 20, 2024

Reported In

Software

  • LabVIEW

Issue Details

  • When running my LabVIEW executable based on Object Oriented Programming, I am getting error 1556, this error does not happen in my development environment. 

Error 1556 occurred at <VI Path>

Possible reasons: 

LabVIEW: (Hex 0x614) The reference is invalid. This error might occur because the reference has been deleted 

Solution

This can occur in a LabVIEW executable when a class is dynamically loaded in the project but not included in the executable. To solve the issue, follow any of the next steps

  • Include the class that is being dynamically called in the Source Files>>Always Included section of the build specifications.
  • Drop a class constant of the missing class in the block diagram, this way the Application builder will include the missing class in the build. 

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