Describe error handling mechanisms in SOAP UI.

Error handling in SOAP UI ensures web service tests are reliable. Mechanisms include assertions, event handlers, and scripting. Assertions validate responses, event handlers execute scripts at specific points, and scripting allows custom error handling logic.

Example of a simple Groovy script for error handling:
if (context.testCase.getTestStepByName("Request 1").getProperty("response").value.contains("Error")) {
    log.info("Error found in response, retrying...")
    context.testCase.getTestStepByName("Request 1").run(testRunner, context)
}?