Suddenly can't run TestNG tests from ant ([testng] Caused by: java.lang.ClassNotFoundException: com.beust.jcommander.ParameterException)

Question

I am using ant and TestNG 6.1.1, and I had my tests working just fine yesterday. Today when I try to run the tests I get a NoClassDefFoundError involving com/beust/jcommand

Answer 1

jcommander.jar (e.g. jcommander-1.29.jar) should be present on fileset directory which is mentioned at build.xml

You can download it from: http://mvnrepository.com/artifact/com.beust/jcommander/1.27

OR,

JCommander should be inside testng.jar during using ant. Your testng.jar file might be corrupted, so please replace old testng.jar by new one.