The following is the current version of the description of -single-jar
-single-jar=<JAR file name> Create <JAR file name>.jar and remove class files
The JAR file contains all class files of all specified COBOL programs
Since cobj -single-jar=a.jar prog.cbl creates a jar file a.jar, the message Create <JAR file name>.jar should be replaced by Craete <JAR file name>.