❗ Error: MissingNightsElement = 111

Response Example: 
Error":{"Code":111,"Message":"MissingNightsElement"},"DebugError":{"Incident":0,"TimeStamp":"2025-09-20 10:15:59","Message":"Missing 'Nights' Element under 'Root/Main'"

What it means : 

Your Search request does not include the required Nights element. 

Common reasons : 

<Nights> tag is completely missing from the XML.

Typo in the tag name (e.g., <Night> or any other incorrect spelling instead of <Nights>).

Example of a wrong request : 
<Root>
    <Header debug="1">
        <Agency></Agency>
        <User></User>
        <Password></Password>
        <Operation>HOTEL_SEARCH_REQUEST</Operation>
        <OperationType>Request</OperationType>
    </Header>
    <Main Version="2.4" ResponseFormat="JSON">
        <SortOrder>1</SortOrder>
        <FilterPriceMin>0</FilterPriceMin>
        <Nationality>US</Nationality>
        <FilterPriceMax>10000</FilterPriceMax>
        <MaximumWaitTime>20</MaximumWaitTime>
        <MaxResponses>10000</MaxResponses>
        <FilterRoomBasises>
            <FilterRoomBasis></FilterRoomBasis>
        </FilterRoomBasises>
        <HotelName></HotelName>
        <Apartments>false</Apartments>
        <Hotels>
            <HotelId>96773</HotelId>
        </Hotels>
        <ArrivalDate>2025-11-20</ArrivalDate>
        <Rooms>
            <Room Adults="2" RoomCount="1" ChildCount="0"></Room>
        </Rooms>
    </Main>
</Root>

Resolution / How to fix

1. Add the <Nights> element with a valid number of nights.

   • Example: <Nights>3</Nights>

2. Make sure the tag name is spelled exactly as <Nights> and is placed inside <Root><Main>.

Example of correct request : 
<Root>
    <Header debug="1">
        <Agency></Agency>
        <User></User>
        <Password></Password>
        <Operation>HOTEL_SEARCH_REQUEST</Operation>
        <OperationType>Request</OperationType>
    </Header>
    <Main Version="2.4" ResponseFormat="JSON">
        <SortOrder>1</SortOrder>
        <FilterPriceMin>0</FilterPriceMin>
        <Nationality>US</Nationality>
        <FilterPriceMax>10000</FilterPriceMax>
        <MaximumWaitTime>20</MaximumWaitTime>
        <MaxResponses>10000</MaxResponses>
        <FilterRoomBasises>
            <FilterRoomBasis></FilterRoomBasis>
        </FilterRoomBasises>
        <HotelName></HotelName>
        <Apartments>false</Apartments>
        <Hotels>
            <HotelId>96773</HotelId>
        </Hotels>
        <ArrivalDate>2025-11-20</ArrivalDate>
        <Nights>3</Nights>
        <Rooms>
            <Room Adults="2" RoomCount="1" ChildCount="0"></Room>
        </Rooms>
    </Main>
</Root>