Error message Unable to request license in the System Plug-In


When updating the Vista database in the TAC Vista System Pug-In an error message is displayed that says "Unable to request license".

Product Line

TAC Vista


  • TAC Vista System Plug-In


This error message is a result of not having the Vista Workstation license in the permanent license file. The licensing for the TAC Vista System Plug-In is included with the Workstation license.


The license for Vista Workstation must be purchased in order for the system plug-in to work. For more information about the license packages see Lessons Learned Article #5997