The Wildcat COBOL compiler has been updated so that all math operations are implemented, although rounding and error handling are not finished yet. The latest release includes this update, the NUnit tests for the changes, and a version of Hello World using classes from the .NET framework which has been tested on Microsoft .NET, Mono and Portable.NET. This release also has improved compiler error handling. The development of the compiler is now taking a test-driven approach as support for NUnit progresses.