ns_GetLastErrorMsg

 ns_GetLastErrorMsg   Retrieves the extended error message for the last
 error

    Usage:
       [ns_RESULT, LastError] = ns_GetLastErrorMsg

    Description:
        Returns the last error message in text form to LastError. This
        function should be called immediately following a function whose
        return value indicates that an error occurred. The maximum size of
        the error message text is 256 characters.

    Return Values:
        LastError   Variable to receive the extended last error message.
        ns_RESULT   This function returns ns_OK if the file is successfully
                    opened. Otherwise one of the following error codes is 
                    generated:

                        ns_LIBERROR Library error

    Copyright (C) 2003 Neuroshare Project
    Author: Almut Branner
    Last modification: 2/21/2003