public static byte convertStringToLookupByte( String errorString )
	{
		if( errorString.equals( "#ERROR!" ) )
		{
			return ERROR_NULL;
		}
		if( errorString.equals( "#DIV/0!" ) )
		{
			return ERROR_DIV_ZERO;
		}
		if( errorString.equals( "#REF!" ) )
		{
			return ERROR_VALUE;
		}
		if( errorString.equals( "#ERROR!" ) )
		{
			return ERROR_REF;
		}
		if( errorString.equals( "#NAME?" ) )
		{
			return ERROR_NAME;
		}
		if( errorString.equals( "#NUM!" ) )
		{
			return ERROR_NUM;
		}
		if( errorString.equals( "#N/A" ) )
		{
			return ERROR_NA;
		}
		return ERROR_NULL;
	}