Submit button with required fields notification.

Fred i have made one more button for another report, but has the same problem as with button for DAILY SALES, when i add at then the part to delete information from field, line 127 it shows problem. Any chance you could look please what I am doing wrong? I have used null or 0 according what you wrote before.

let t := this;
let xlf := urlDecode("%0A");
let dateCheck := if Date = null then 1 else 0 end;
let productsCheck := if PRODUCT = null then 1 else 0 end;
let shopsCheck := if SHOP = null then 1 else 0 end;
let employeesCheck := if NAME = null then 1 else 0 end;
let preparedwhereCheck := if PREPARED = null then 1 else 0 end;
let startCheck := if START = null then 1 else 0 end;
let endCheck := if END = null then 1 else 0 end;
let breakstartCheck := if 'BREAK START' = null then 1 else 0 end;
let breakendCheck := if 'BREAK END' = null then 1 else 0 end;
let break2startCheck := if 'BREAK 2 START' = null then
        1
    else
        0
    end;
let break2endCheck := if 'BREAK 2 END' = null then 1 else 0 end;
let break3startCheck := if 'BREAK 3 START' = null then
        1
    else
        0
    end;
let break3endCheck := if 'BREAK 3 END' = null then 1 else 0 end;
let kgpreparedCheck := if 'KG PREPARED' = null then 1 else 0 end;
let itemspreparedCheck := if 'ITEMS PREPARED' = null then
        1
    else
        0
    end;
let itemsrejectedCheck := if 'ITEMS REJECTED' = null then
        1
    else
        0
    end;
let fieldCheck := [dateCheck, productsCheck, shopsCheck, employeesCheck, preparedwhereCheck, startCheck, endCheck, breakstartCheck, breakendCheck, break2startCheck, break2endCheck, break3startCheck, break3endCheck, kgpreparedCheck, itemspreparedCheck, itemsrejectedCheck];
if sum(fieldCheck) = 0 then
    let newRec := (create 'HANGING PRODUCTION');
    newRec.(
        DATE := t.Date;
        PRODUCT := t.PRODUCT;
        SHOP := t.SHOP;
        NAME := t.NAME;
        'PREPARED WHERE' := t.PREPARED;
        START := t.START;
        END := t.END;
        'BREAK START' := t.'BREAK START';
        'BREAK END' := t.'BREAK END';
        'BREAK 2 START' := t.'BREAK 2 START';
        'BREAK 2 END' := t.'BREAK 2 END';
        'BREAK 3 START' := t.'BREAK 3 START';
        'BREAK 3 END' := t.'BREAK 3 END';
        'KG PREPARED' := t.'KG PREPARED';
        'ITEMS PREPARED' := t.'ITEMS PREPARED';
        'ITEMS REJECTED' := t.'ITEMS REJECTED'
    );
    alert("New Record Added")
else
    alert("Please fill in the following fields:" +
    if item(fieldCheck, 0) = 1 then
        xlf + "DATE"
    end +
    " " +
    if item(fieldCheck, 1) = 1 then
        xlf + "PRODUCTS"
    end +
    " " +
    if item(fieldCheck, 2) = 1 then
        xlf + "SHOPS"
    end +
    "" +
    if item(fieldCheck, 3) = 1 then
        xlf + "NAME"
    end +
    "" +
    if item(fieldCheck, 4) = 1 then
        xlf + "PREPARED"
    end +
    "" +
    if item(fieldCheck, 5) = 1 then
        xlf + "START"
    end +
    "" +
    if item(fieldCheck, 6) = 1 then
        xlf + "END"
    end +
    "" +
    if item(fieldCheck, 7) = 1 then
        xlf + "BREAK START"
    end +
    "" +
    if item(fieldCheck, 8) = 1 then
        xlf + "BREAK END"
    end +
    "" +
    if item(fieldCheck, 9) = 1 then
        xlf + "BREAK 2 START"
    end +
    "" +
    if item(fieldCheck, 10) = 1 then
        xlf + "BREAK 2 END"
    end +
    "" +
    if item(fieldCheck, 11) = 1 then
        xlf + "BREAK 3 START"
    end +
    "" +
    if item(fieldCheck, 12) = 1 then
        xlf + "BREAK 3 END"
    end +
    "" +
    if item(fieldCheck, 13) = 1 then
        xlf + "KG PREPARED"
    end +
    "" +
    if item(fieldCheck, 14) = 1 then
        xlf + "ITEMS PREPARED"
    end +
    "" +
    if item(fieldCheck, 15) = 1 then
        xlf + "ITEMS REJECTED"
    end +
    "

    ")
end

    Date := null;
    PRODUCT := 0;
    SHOP := 0;
    NAME := 0;
    PREPARED := null;
    START := null;
    END := null;
    'BREAK START' := null;
    'BREAK END' := null;
    'BREAK 2 START' := null;
    'BREAK 2 END' := null;
    'BREAK 3 START' := null;
    'BREAK 3 END' := null;
    'KG PREPARED' := null;
    'ITEMS PREPARED' := null;
    'ITEMS REJECTED' := null;

end