Please post the full contents of the window showing all of the error message text. To copy the contents of the command prompt window: Click on Icon in upper left corner Select Edit Select 'Select All' - The selection will show Click in upper left again Select Edit and click 'Copy'
Paste here.
What class files are in the weka.jar file? Is abc the full name of the class you are trying to execute?
We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.