Running MALLET on Windows; could not find or load main class cc.mallet.classify.tui.Text2Vectors

Question

I'm trying to get MALLET running on a 64-bit Windows 10 Enterprise machine from the native command prompt (cmd.exe). (I tried doing everything with Git Bash, but got stuck even earlier in the process.)

What I've done:

• Installed JDK 8u281 for 64-bit Windows
• Downloaded and installed MALLET 2.0.8 in my C:\
• Installed Apache Ant in my C:\Program Files (per this Medium post)
• Created new environmental variables

• Adjusted my path

• Run ant within the MALLET folder (received BUILD SUCCESSFUL)
• Run ant jar within the MALLET folder (received BUILD SUCCESSFUL)
• Typed bin\mallet, which displays the MALLET commands

However, when I tried to create a .mallet file, using bin\mallet import-dir, I get the error message Error: Could not find or load main class cc.mallet.classify.tui.Text2Vectors.

I (and my students) will appreciate any help in figuring out how to get this running.

Answer 1

This looks like a classpath issue. I'm not sure how Java on Windows handles classpath now. Try setting %MALLET_HOME% to C:\Mallet-2.0.8, not the bin directory? The classes would be in %MALLET_HOME%\class also, perhaps try adding that to %PATH% or %CLASSPATH%?