diff --git a/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ProcessedFile/ByDataOperationsFailure.tsx b/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ProcessedFile/ByDataOperationsFailure.tsx
index ab25ccc56..eb5776817 100644
--- a/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ProcessedFile/ByDataOperationsFailure.tsx
+++ b/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ProcessedFile/ByDataOperationsFailure.tsx
@@ -117,7 +117,7 @@ function ByDataOperationsFailure(props: IProps) {
                 </div>
             </div>
             <hr />
-            <LoadingScreen Show={pageStatus == 'idle'} />
+            <LoadingScreen Show={pageStatus !== 'idle'} />
             <Table<OpenXDA.Types.DataOperationFailure>
                 TableClass="table table-hover"
                 Data={failureData}
diff --git a/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListForm.tsx b/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListForm.tsx
index 52fec6e67..a7eb03883 100644
--- a/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListForm.tsx
+++ b/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListForm.tsx
@@ -25,6 +25,8 @@ import * as React from 'react';
 import { SystemCenter } from '@gpa-gemstone/application-typings';
 import { Input } from '@gpa-gemstone/react-forms';
 import { IsInteger } from '@gpa-gemstone/helper-functions';
+import { useAppSelector, useAppDispatch } from '../hooks';
+import { ValueListSlice } from '../Store/Store';
 
 interface IProps {
     Record: SystemCenter.Types.ValueListItem,
@@ -33,6 +35,16 @@ interface IProps {
 }
 
 export default function ValueListForm(props: IProps) {
+    const dispatch = useAppDispatch();
+
+    const data = useAppSelector(ValueListSlice.Data);
+    const status = useAppSelector(ValueListSlice.Status);
+    const parentID = useAppSelector(ValueListSlice.ParentID);
+
+    React.useEffect(() => {
+        if (status == 'uninitiated' || status == 'changed' || parentID != props.Record.GroupID)
+            dispatch(ValueListSlice.Fetch(props.Record.GroupID));
+    }, [status, parentID, props.Record.GroupID]);
 
     React.useEffect(() => {
         if (props.SetErrors == undefined)
@@ -40,8 +52,10 @@ export default function ValueListForm(props: IProps) {
         const e = [];
         if (props.Record.Value == null || props.Record.Value.length == 0)
             e.push('A Value is required.');
-        if (props.Record.Value != null && props.Record.Value.length > 200)
+        else if (props.Record.Value.length > 200)
             e.push('Value must be less than 200 characters.');
+        else if (data.findIndex(valueItem => props.Record.ID !== valueItem.ID && props.Record.Value.localeCompare(valueItem.Value, undefined, { sensitivity: 'base' }) === 0) >= 0)
+            e.push('Value may not be a duplicate of another in the same group.');
         if (props.Record.AltValue != null && props.Record.AltValue.length > 200)
             e.push('Label must be less than 200 characters.');
         if (props.Record.SortOrder != null && !IsInteger(props.Record.SortOrder))
diff --git a/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListGroupDelete.tsx b/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListGroupDelete.tsx
index 62bece827..a539726e3 100644
--- a/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListGroupDelete.tsx
+++ b/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListGroupDelete.tsx
@@ -22,20 +22,22 @@
 //******************************************************************************************************
 
 import * as React from 'react';
-import { useAppSelector, useAppDispatch } from '../hooks';
 import { Warning } from '@gpa-gemstone/react-interactive';
 import { SystemCenter } from '@gpa-gemstone/application-typings';
+interface IProps {
+    CallBack: (conf: boolean) => void,
+    Record: SystemCenter.Types.ValueListGroup,
+    Show: boolean
+}
 
-declare var homePath: string;
-interface IProps { CallBack: (conf: boolean) => void, Record: SystemCenter.Types.ValueListGroup, Show: boolean }
-export const requiredValueLists = ["TimeZones", "Make", "Model", "Unit", "Category", "SpareChannel", "TrendLabelDefaults", "TrendLabelOptions"]
+export const RequiredValueLists = ["TimeZones", "Make", "Model", "Unit", "Category", "SpareChannel", "TrendLabelDefaults", "TrendLabelOptions"]
 
 export function ValueListGroupDelete(props: IProps) {
     const [message, setMessage] = React.useState<string>('')
     const [prevent, setPrevent] = React.useState<boolean>(false)
 
     React.useEffect(() => {
-        if (requiredValueLists.includes(props.Record?.Name)) {
+        if (RequiredValueLists.includes(props.Record?.Name)) {
             setPrevent(true);
             setMessage('This Value List Group is required and cannot be removed.')
             return
@@ -52,65 +54,33 @@ export function ValueListGroupDelete(props: IProps) {
     )
 }
 
-interface IPropsItem { 
+interface IPropsItem {
     CallBack: (conf: boolean) => void,
-    Record: SystemCenter.Types.ValueListItem, 
-    Show: boolean, 
-    ItemCount: number, 
+    Record: SystemCenter.Types.ValueListItem,
+    Show: boolean,
+    GroupItemCount: number,
+    AssignedDictionary: { [key: string]: number },
     Group: SystemCenter.Types.ValueListGroup
 }
 
 export function ValueListItemDelete(props: IPropsItem) {
+    const message = React.useMemo(() => {
+        const assignedCount = props.AssignedDictionary?.[props.Record.ID] ?? 0;
 
-    const [message, setMessage] = React.useState<string>('')
-    const [prevent, setPrevent]  = React.useState<boolean>(false)
-    const [removalCount, setRemovalCount] = React.useState<number>(0);
-
-    React.useEffect(() => {
-        if ((props.Group?.Name?.length ?? 0) === 0 || (props.Record?.Value ?? 0) === 0)
-            return;
-        
-        const h =  $.ajax({
-            type: "GET",
-            url: `${homePath}api/ValueList/Count/${props.Group?.Name ?? 'Make'}/${props.Record?.Value}`,
-            contentType: "application/json; charset=utf-8",
-            dataType: 'json',
-            cache: false,
-            async: true
-        });
-        h.then((c: number) => {setRemovalCount(c);});
-        return () => { if (h != null && h.abort != null) h.abort();}
-    }, [props.Group, props.Record])
-    
-    React.useEffect(() => {
-        if (requiredValueLists.includes(props.Group?.Name) && props.ItemCount == 1) {
-            setPrevent(true);
-            setMessage('This Value List Group is required and must contain at least 1 item.')
-        }
-        else if (props.ItemCount == 1 && removalCount > 0)
-        {
-            setMessage('Removing this Value List Item will result in an empty Value List Group. All Fields using this Value List Group will be changed to strings.')
-            setPrevent(false);
-        }
-        else if (requiredValueLists.includes(props.Group?.Name) && removalCount > 0) {
-            setPrevent(true);
-            setMessage('This Value List Group is required and this Value List Item is still in use. Use of this Value List Item must be removed before it can be deleted.')
-        }
-        else if (removalCount > 0)
-        {
-            setMessage(`This Value List Group is in use, with ${removalCount} values corresponding to this Value List Item. These values will be unassigned.`)
-            setPrevent(false);
-        }
-        else {
-            setPrevent(false);
-            setMessage('This will permanently delete this Value List Item and cannot be undone.')   
-        }
-    }, [props.Group, removalCount, props.ItemCount])
+        if (props.GroupItemCount == 1 && assignedCount > 0)
+            return 'Removing this Value List Item will result in an empty Value List Group. All Fields using this Value List Group will be changed to strings.';
+        else if (assignedCount > 0)
+            return `This Value List Group is in use, with ${assignedCount} values corresponding to this Value List Item. These values will be unassigned.`;
+        else
+            return 'This will permanently delete this Value List Item and cannot be undone.';
+    }, [props.Group?.Name, props.Record.ID, props.AssignedDictionary, props.GroupItemCount])
 
-    return ( <Warning
-        Message={message}
-        Show={props.Show} Title={'Delete ' + (props.Record.AltValue ?? props.Record.Value)}
-        ShowCancel={!prevent}
-        CallBack={(c) => {props.CallBack(c && !prevent)}} />
+    return (
+        <Warning
+            Message={message}
+            Show={props.Show}
+            Title={'Delete ' + (props.Record.AltValue ?? props.Record.Value)}
+            CallBack={props.CallBack}
+        />
     )
 }
\ No newline at end of file
diff --git a/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListGroupForm.tsx b/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListGroupForm.tsx
index 3bc61d862..e7959a156 100644
--- a/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListGroupForm.tsx
+++ b/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListGroupForm.tsx
@@ -24,7 +24,7 @@
 import * as React from 'react';
 import { SystemCenter } from '@gpa-gemstone/application-typings';
 import { Input, TextArea } from '@gpa-gemstone/react-forms';
-import { requiredValueLists } from './ValueListGroupDelete';
+import { RequiredValueLists } from './ValueListGroupDelete';
 
 export default function ValueListGroupForm(props: { Record: SystemCenter.Types.ValueListGroup, Setter: (record: SystemCenter.Types.ValueListGroup) => void, setErrors?: (e: string[]) => void }) {
     function Valid(field: keyof (SystemCenter.Types.ValueListGroup)): boolean {
@@ -35,7 +35,8 @@ export default function ValueListGroupForm(props: { Record: SystemCenter.Types.V
         return false;
     }
 
-    const required = requiredValueLists.includes(props.Record?.Name)
+    const required = RequiredValueLists.includes(props.Record?.Name);
+
     return (
         <form>
             <Input<SystemCenter.Types.ValueListGroup> Record={props.Record} Field={'Name'} Feedback={'Name must be less than 200 characters.'} 
diff --git a/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListGroupItem.tsx b/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListGroupItem.tsx
index 267eb32b3..dbecd776e 100644
--- a/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListGroupItem.tsx
+++ b/Source/Applications/SystemCenter/wwwroot/Scripts/TSX/SystemCenter/ValueListGroup/ValueListGroupItem.tsx
@@ -29,10 +29,14 @@ import { ValueListSlice } from '../Store/Store';
 import ValueListForm from './ValueListForm';
 import { Table, Column } from '@gpa-gemstone/react-table';
 import { ReactIcons } from '@gpa-gemstone/gpa-symbols';
-import { Modal, Warning } from '@gpa-gemstone/react-interactive';
-import { ValueListItemDelete } from './ValueListGroupDelete';
+import { Modal } from '@gpa-gemstone/react-interactive';
+import { ValueListItemDelete, RequiredValueLists } from './ValueListGroupDelete';
+import { ToolTip } from '@gpa-gemstone/react-forms';
+
+interface IProps {
+    Record: SystemCenter.Types.ValueListGroup
+}
 
-interface IProps { Record: SystemCenter.Types.ValueListGroup }
 export default function ValueListGroupItems(props: IProps) {
     const dispatch = useAppDispatch();
 
@@ -48,16 +52,40 @@ export default function ValueListGroupItems(props: IProps) {
     const [showModal, setShowModal] = React.useState<boolean>(false);
     const [errors, setErrors] = React.useState<string[]>([]);
 
+    const [countDictionary, setCountDictionary] = React.useState<{ [key: string]: number }>({});
+    const [hover, setHover] = React.useState<string>('');
+
+    const disallowReason = React.useCallback((ID: string) => {
+        if (!RequiredValueLists.includes(props.Record?.Name))
+            return null;
+        if (data.length == 1)
+            return 'This Value List Group is required and must contain at least 1 item.';
+        if ((countDictionary?.[ID] ?? 0) !== 0)
+            return 'This Value List Group is required and this Value List Item is still in use. Use of this Value List Item must be removed before it can be deleted.';
+
+        return null;
+    }, [props.Record?.Name, data.length, countDictionary]);
+
     React.useEffect(() => {
         if (status == 'uninitiated' || status == 'changed' || parentID != props.Record.ID)
             dispatch(ValueListSlice.Fetch(props.Record.ID));
     }, [status, parentID, props.Record.ID]);
 
-    function Delete() {
-        dispatch(ValueListSlice.DBAction({ verb: 'DELETE', record: { ...record } }));
-        setShowWarning(false);
-        setRecord(emptyRecord);
-    }
+    React.useEffect(() => {
+        if (props.Record?.Name == null) return;
+
+        const h = $.ajax({
+            type: "GET",
+            url: `${homePath}api/ValueList/Count/${props.Record.Name}`,
+            contentType: "application/json; charset=utf-8",
+            dataType: 'json',
+            cache: false,
+            async: true
+        });
+        h.then(setCountDictionary);
+
+        return () => { if (h?.abort != null) h.abort(); }
+    }, [props.Record?.Name]);
 
     return (
         <div className="card" style={{ flex: 1, display: 'flex', flexDirection: 'column', overflow: 'hidden' }}>
@@ -116,18 +144,38 @@ export default function ValueListGroupItems(props: IProps) {
                             AllowSort={false}
                             HeaderStyle={{ width: 'auto' }}
                             RowStyle={{ width: 'auto' }}
-                            Content={({ item }) => <>
-                                <button className="btn btn-sm" onClick={(e) => {
-                                    e.preventDefault();
-                                    setRecord(item);
-                                    setShowModal(true);
-                                }}><ReactIcons.Pencil Color="var(--warning)" Size={20} /></button>
-                                <button className="btn btn-sm" onClick={(e) => {
-                                    e.preventDefault();
-                                    setRecord(item);
-                                    setShowWarning(true)
-                                }}><ReactIcons.TrashCan Color="var(--danger)" Size={20} /></button>
-                            </> }
+                            Content={({ item }) => {
+                                const id = item.ID.toString();
+                                const isDisallowed = disallowReason(id) != null;
+                                return (
+                                    <>
+                                        <button
+                                            className="btn btn-sm"
+                                            onClick={(e) => {
+                                                e.preventDefault();
+                                                setRecord(item);
+                                                setShowModal(true);
+                                            }}
+                                        >
+                                            <ReactIcons.Pencil Color="var(--warning)" Size={20} />
+                                        </button>
+                                        <button
+                                            className={`btn btn-sm${isDisallowed ? " disabled" : ""}`}
+                                            onClick={(e) => {
+                                                e.preventDefault();
+                                                if (isDisallowed) return;
+                                                setRecord(item);
+                                                setShowWarning(true);
+                                            }}
+                                            onMouseEnter={() => { if (isDisallowed) setHover(id); }}
+                                            onMouseLeave={() => setHover('')}
+                                            data-tooltip={id}
+                                        >
+                                            <ReactIcons.TrashCan Color="var(--danger)" Size={20} />
+                                        </button>
+                                    </>
+                                );
+                            }}
                         > <p></p>
                         </Column>
                     </Table>
@@ -142,14 +190,22 @@ export default function ValueListGroupItems(props: IProps) {
             </div>
             <ValueListItemDelete
                 Show={showWarning}
-                CallBack={(conf) => { if (conf) Delete(); setShowWarning(false); }}
+                CallBack={(conf) => {
+                    if (conf)
+                        dispatch(ValueListSlice.DBAction({ verb: 'DELETE', record: { ...record } }));
+                    setShowWarning(false);
+                }}
                 Record={record}
-                ItemCount={data.length}
+                GroupItemCount={data.length}
+                AssignedDictionary={countDictionary}
                 Group={props.Record}
-                />
+            />
+            <ToolTip Show={hover !== ''} Position={'bottom'} Target={hover}>
+                {disallowReason(hover)}
+            </ToolTip>
             <Modal Title={record.ID == 0 ? 'Add New Value List Item' : 'Edit ' + (record.AltValue ?? record.Value)} Show={showModal} ShowCancel={false} ConfirmText={'Save'}
                 ConfirmShowToolTip={errors.length > 0}
-                CancelToolTipContent={<> {errors.map(e => <p><ReactIcons.CrossMark Color="var(--danger)" /> {e}</p>)}</>}
+                ConfirmToolTipContent={errors.map((e, i) => <p key={i}><ReactIcons.CrossMark Color="var(--danger)" /> {e}</p>)}
                 DisableConfirm={errors.length > 0}
                 ShowX={true} CallBack={(conf) => {
                     setShowModal(false);