The JCO Test utility completes the following checks:
Ensures that the sapjco3.jar file, which contains the exported JCO interface, is present.
Ensures that the JCO native support libraries are properly installed.
Ensures that connection parameters to the SAP target system are correct.
Ensures that the authentication parameters to the SAP target system are correct.
Ensures that the selected language code is valid.
Ensures that the BAPIs used by the driver are present as expected for the version of the SAP target system.