Type Definition Could Not Be Found Error in LabVIEW

Updated Aug 24, 2023

Reported In


  • LabVIEW

Issue Details

I get a broken run arrow, and the following error message:
"The master copy for this type definition could not be found or the master copy has errors.  You must find and fix the master copy, or right-click on this type definition and select Disconnect."

Why is this error occurring, and how do I fix it?


There are two options.
  1. Double click on the type definition in the project files.  Locate the file path to the .ctl file in the following pop-up page.
  2. Right click on the item, and select Disconnect from Type Def.  You can then make a new type definition if needed.

Additional Information

This error will occur if the file path to a .ctl file for the type definition cannot be found.  Therefore we need to either find it, so LabVIEW knows where and what the associated file is, or we need to create a new type definition .ctl file.