000233 : Cannot initialize TIN
An intermediate TIN surface is created from the input points and is used to generate the output Thiessen polygons. A failure to create the intermediate TIN surface has failed. This error can occur for a variety of reasons, for example, if the input has no point features or if an environment such as extent is set so that no input point features are used.
Check the input point features and make sure that features exist in this particular feature class and that if the extent environment is set, the input point features fall within its coordinate range.