examples session not opening (from Ramsey's class)

[arntzy]

Exception in thread "main" java.lang.NumberFormatException: For input string: "datomic:free://localhost:4334/c899f45d-1a5e-4c5e-9672-0dfe4d874109" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) at java.lang.Long.parseLong(Long.java:441) at java.lang.Long.(Long.java:702) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at clojure.lang.Reflector.invokeConstructor(Reflector.java:180) at datomic$fn__21.invoke(datomic.clj:8) at datomic.cli$coerce_vals$fn1209.invoke(cli.clj:131) at clojure.core.protocols$fn6022.invoke(protocols.clj:79) at clojure.core.protocols$fn5979$G5974__5992.invoke(protocols.clj:13) at clojure.core$reduce.invoke(core.clj:6177) at datomic.cli$coerce_vals.invoke(cli.clj:129) at datomic.cli$parse_or_exitBANG.invoke(cli.clj:159) at datomic$_main.doInvoke(datomic.clj:137) at clojure.lang.RestFn.invoke(RestFn.java:457) at clojure.lang.Var.invoke(Var.java:427) at clojure.lang.AFn.applyToHelper(AFn.java:172) at clojure.lang.Var.applyTo(Var.java:532) at clojure.core$apply.invoke(core.clj:617) at clojure.main$main_opt.invoke(main.clj:335) at clojure.main$main.doInvoke(main.clj:440) at clojure.lang.RestFn.invoke(RestFn.java:619) at clojure.lang.Var.invoke(Var.java:445) at clojure.lang.AFn.applyToHelper(AFn.java:202) at clojure.lang.Var.applyTo(Var.java:532) at clojure.main.main(main.java:37)