VERIFIED SOLUTION i
Product Affected: MapInfo Professional
When trying to connect to an Oracle Database in MapInfo Pro you may get the error Oracle Error: ORA-12154: TNS:could not resolve service name.
TNS_ADMIN does not work with path names that have spaces in them.
ResolutionUPDATED: July 3, 2019
Place the tnsnames.ora file in a directory that does not have spaces in the name.