This makes clear that the error message is generated by the XSL Formatter product from Antenna House. You will have to look at the documentation for that product, or ask on the support forums for that product, for information on what might be causing this error, or how to get more specific diagnostics. It looks like a catch-all error code to me: sometimes when this happens there is a log file somewhere containing more detailed error information.
Michael Kay
http://www.saxonica.com/
Author, XSLT 2.0 and XPath 2.0 Programmer's Reference