Unknown error code <error number> for service <service name>.
The Data Transformation service returned a status code that is not recognized by the Unstructured Data transformation. The status code should be between 1 and 5.
You can view the Data Transformation event log when a failure occurs in a Data Transformation service. By default, the Engine stores the log in the following location: C:\Documents and Settings\<USER>\Application Data\Informatica\DataTransformation\CMReports.