A computer was installed with version 3.5.34 of Tridium's Vykon-branded Niagara AX and Schneider-Electric's TAC-branded Niagara G3.
An error appeared indicating that the core distribution files were missing.
TAC I/A Series
Niagara G3 Workbench
The sw directory was missing under the 3.5.34 directory.
Un-install both versions and re-install just one of them.
The Vykon-branded and TAC-branded licenses files can be kept in a separate directory and swapped in-and-out as required.