diff --git a/docs/8.0/ayanova/docs/api-error-codes.md b/docs/8.0/ayanova/docs/api-error-codes.md
index 56cfeff2..2990cdd4 100644
--- a/docs/8.0/ayanova/docs/api-error-codes.md
+++ b/docs/8.0/ayanova/docs/api-error-codes.md
@@ -20,6 +20,7 @@ Here are all the API level error codes that can be returned by the API server:
 | 2010 | Object not found - API could not find the object requested |
 | 2020 | PUT Id mismatch - object Id does not match route Id |
 | 2030 | Invalid operation - operation could not be completed, not valid, details in message property |
+| 2040 | Not enough inventory - too few parts in stock to complete operation |
 | 2200 | Validation error - general issue with object overall not valid, specifics in "details" property |
 | 2201 | Validation error - Field is required but is empty or null |
 | 2202 | Validation error - Field length exceeded. The limit will be returned in the `message` property of the validation error |
diff --git a/server/AyaNova/biz/ApiErrorCode.cs b/server/AyaNova/biz/ApiErrorCode.cs
index 51fa4f5a..45c24651 100644
--- a/server/AyaNova/biz/ApiErrorCode.cs
+++ b/server/AyaNova/biz/ApiErrorCode.cs
@@ -19,6 +19,7 @@ namespace AyaNova.Biz
         NOT_FOUND = 2010,
         PUT_ID_MISMATCH = 2020,
         INVALID_OPERATION = 2030,
+        INSUFFICIENT_INVENTORY = 2040,
         VALIDATION_FAILED = 2200,
         VALIDATION_REQUIRED = 2201,
         VALIDATION_LENGTH_EXCEEDED = 2202,
diff --git a/server/AyaNova/biz/PartInventoryBiz.cs b/server/AyaNova/biz/PartInventoryBiz.cs
index b2189a08..6fc0138b 100644
--- a/server/AyaNova/biz/PartInventoryBiz.cs
+++ b/server/AyaNova/biz/PartInventoryBiz.cs
@@ -4,12 +4,9 @@ using Microsoft.EntityFrameworkCore;
 using System.Linq;
 using AyaNova.Util;
 using AyaNova.Api.ControllerHelpers;
-using Microsoft.Extensions.Logging;
 using AyaNova.Models;
 using Newtonsoft.Json.Linq;
 using System.Collections.Generic;
-using Newtonsoft.Json;
-using Microsoft.EntityFrameworkCore.Storage;
 
 namespace AyaNova.Biz
 {
@@ -237,14 +234,18 @@ namespace AyaNova.Biz
                 return;
             }
 
-              //Balance must not be negative
-            if (proposedObj.Balance < 0 )
+            //Balance must not be negative
+            //return the current balance
+            if (proposedObj.Balance < 0)
             {
-                AddError(ApiErrorCode.VALIDATION_INVALID_VALUE, "Balance", "Transaction would result in a negative balance (not enough inventory to process this transaction)");
+                string currentBalance = "0";
+                if (proposedObj.LastBalance != null)
+                    currentBalance = proposedObj.LastBalance.ToString();
+                AddError(ApiErrorCode.INSUFFICIENT_INVENTORY, "Balance", $"available:{currentBalance}");
                 return;
             }
 
-          
+
             //date is newer than last entry date?
             if (proposedObj.LastEntryDate != null && proposedObj.LastEntryDate > proposedObj.EntryDate)
             {
diff --git a/server/AyaNova/resource/de.json b/server/AyaNova/resource/de.json
index 04a512cd..76a76985 100644
--- a/server/AyaNova/resource/de.json
+++ b/server/AyaNova/resource/de.json
@@ -1727,6 +1727,7 @@
   "ErrorAPI2010": "Objekt nicht gefunden",
   "ErrorAPI2020": "Die Routen-ID stimmt nicht mit der Objectid überein",
   "ErrorAPI2030": "Ungültiger Vorgang",
+  "ErrorAPI2040": "Nicht genügend Inventar",
   "ErrorAPI2200": "Validierungsfehler",
   "ErrorAPI2201": "Fehlendes Pflichtfeld",
   "ErrorAPI2202": "Maximale Länge überschritten",
diff --git a/server/AyaNova/resource/en.json b/server/AyaNova/resource/en.json
index eca33edf..2f5051d0 100644
--- a/server/AyaNova/resource/en.json
+++ b/server/AyaNova/resource/en.json
@@ -1727,6 +1727,7 @@
   "ErrorAPI2010": "Object not found",
   "ErrorAPI2020": "Route id doesn't match object id",
   "ErrorAPI2030": "Invalid operation",
+  "ErrorAPI2040": "Not enough inventory",
   "ErrorAPI2200": "Validation error",
   "ErrorAPI2201": "Required field",
   "ErrorAPI2202": "Length exceeded",
diff --git a/server/AyaNova/resource/es.json b/server/AyaNova/resource/es.json
index a27ec560..59190567 100644
--- a/server/AyaNova/resource/es.json
+++ b/server/AyaNova/resource/es.json
@@ -1727,6 +1727,7 @@
   "ErrorAPI2010": "Objeto no encontrado",
   "ErrorAPI2020": "La ID de ruta no coincide con la ID de objeto",
   "ErrorAPI2030": "Operación no válida",
+  "ErrorAPI2040": "No hay suficiente inventario",
   "ErrorAPI2200": "Error de validación",
   "ErrorAPI2201": "Campo requerido",
   "ErrorAPI2202": "Longitud excedida",
diff --git a/server/AyaNova/resource/fr.json b/server/AyaNova/resource/fr.json
index afff32d7..7226680c 100644
--- a/server/AyaNova/resource/fr.json
+++ b/server/AyaNova/resource/fr.json
@@ -1727,6 +1727,7 @@
   "ErrorAPI2010": "Objet introuvable",
   "ErrorAPI2020": "L'ID de route ne correspond pas à l'ID d'objet",
   "ErrorAPI2030": "Opération non valide",
+  "ErrorAPI2040": "Pas assez d'inventaire",
   "ErrorAPI2200": "Erreur de validation",
   "ErrorAPI2201": "Champ obligatoire",
   "ErrorAPI2202": "Longueur maximale dépassée",