I have a `CAML` query which retrieves data from a `SharePoint` list. It passes for 1 input, but fails when there are 2 or more.

**Error:**

> 
> Microsoft.SharePoint.SPException: One or more field types are not
>  installed properly. Go to the list settings page to delete these
>  fields. ---> System.Runtime.InteropServices.COMException: One or more
>  field types are not installed properly. Go to the list settings page
>  to delete these fields.
> 
> 
> 
> 
> ---
> 
> 
> 

After researching, probable cause may be due to mismatch SharePoint column `InternalName` . However, query managed to execute for 1 input, but not 2 or more. 

Base on the query examples below, am I having a wrong format for the `FAIL` cases?

---

**1. PASS:**

```
<Where>
    <And>
        <Eq>
            <FieldRef Name="Header1Ref"/><Value Type="Text">H1</Value>
        </Eq>
        <Neq>
            <FieldRef Name ="ContentType"/><Value Type="Text">Document</Value>
        </Neq>
    </And>
</Where>

```

---

**2. FAIL:**

```
<Where>
    <And>
        <Eq>
            <And>
                <Or>
                    <Eq>
                        <FieldRef Name="Header1Ref"/><Value Type="Text">H1</Value>
                    </Eq>
                    <Eq>
                        <FieldRef Name="Header1Ref"/><Value Type="Text">H2</Value>
                    </Eq>
                </Or>
                    <Neq>
                        <FieldRef Name ="ContentType"/><Value Type="Text">Document</Value>
                    </Neq>
            </And>
        </Eq>
    </And>
</Where>

```

**3. FAIL:**

```
<Where>
    <And>
        <Eq>
            <And>
                <Or>
                    <FieldRef Name="Header1Ref"/><Value Type="Text">H1</Value>
                    <FieldRef Name="Header1Ref"/><Value Type="Text">H2</Value>
                </Or>
                <Neq>
                    <FieldRef Name ="ContentType"/><Value Type="Text">Document</Value>
                </Neq>
            </And>
        </Eq>
        <Neq>
            <FieldRef Name ="ContentType"/><Value Type="Text">Document</Value>
        </Neq>
    </And>
</Where>

```