On Sun, 2020-01-19 at 19:24 -0500, CR20 wrote: > ...which compiled successfully but when I go to run it, with postgresql-42.2.9.jar stored in path C:\PostgreSQL\libs, like as follows: > > java -cp C:\PostgreSQL\libs . CreateTable > > ...the command line returns: > > Error: Could not find or load main class . > > Some of this is my limited knowledge of Java. Indeed. You have to treat the JAR file as if it were a directory, that is, put the file itself on the class path: java -cp C:\PostgreSQL\libs\postgresql-42.2.9.jar;. CreateTable Yours, Laurenz Albe -- Cybertec | https://www.cybertec-postgresql.com