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

The problem here is that certain versions of the testNG jar do not have the jcommander jar code inside of them. As a result, you have to add the classpath to the Jcommander jar separately.

Adding the Jcommander jar to your classpath when you run it will fix the problem, hopefully