Error: Could not find or load main class org.testng.TestNG

Question

Error: Could not find or load main class org.testng.TestNG

I used the following steps/commands to run my testNG script through command prompt:

1. in my project folder, create a lib folder and copy all the jar files
2. open cmd --> cd myProjectDirectoryPath
3. set classpath=myProjectDirectoryPath/bin
4. set classpath=myProjectDirectoryPath/lib/*
5. java org.testNG.TestNG testng.xml

but after that i am getting Could not find or load main class org.testng.TestNG error. tried to debug but still not successful. can someone help me.

Solution

Try at least to add to classpath:

set classpath=myProjectDirectoryPath/bin
set classpath=%classpath%;myProjectDirectoryPath/lib/*

If not, the second "set" override the first.

Of specify the cp (classpath) directly ni the java command:

java -cp myProjectDirectoryPath/bin;myProjectDirectoryPath/lib/* org.testng.TestNG testng.xml

In both instance, make sure you have a testng.jar in one of those folders.