Different types of Error in TOSCA

1. Verification Failure  :: Expected  output not matching actual output.
2. User Abort :: User abouts the execution.
3. Dialog Failure :: Interaction between TOSCA and AUT fails. AUT is not steerable as the object/property does not exist or not matching. 
4. Test configuration errors: These occur if the test environment isn't set up correctly.
5. Execution errors: These occur when test cases fail during execution.
6. Syntax errors: These occur when there's a mistake in the test data or a keyword is used incorrectly.
7. System errors: These occur when there's a system failure or issue.