diff --git a/inventoryManager.lua b/inventoryManager.lua
index 6645009..ad0db89 100644
--- a/inventoryManager.lua
+++ b/inventoryManager.lua
@@ -3256,15 +3256,25 @@ local function main()
             while true do
                 local event, side, channel, replyChannel, message, distance = os.pullEvent("modem_message")
                 if channel == ORDER_CHANNEL and type(message) == "table" then
+                    local handlerOk, handlerErr = pcall(function()
                     if message.type == "order" and message.itemName and message.amount then
                         print(string.format("[NET] Order: %s x%d", message.itemName, message.amount))
-                        local success = orderItem(message.itemName, message.amount, message.dropperName)
-                        networkModem.transmit(replyChannel, ORDER_CHANNEL, {
-                            type    = "order_result",
-                            success = success,
-                            message = statusMessage,
-                            color   = statusColor,
-                        })
+                        local pok, success = pcall(orderItem, message.itemName, message.amount, message.dropperName)
+                        if not pok then
+                            print("[NET] orderItem crashed: " .. tostring(success))
+                            success = false
+                            statusMessage = "Order error"
+                            statusColor = colors.red
+                            statusTimer = 5
+                        end
+                        pcall(function()
+                            networkModem.transmit(replyChannel, ORDER_CHANNEL, {
+                                type    = "order_result",
+                                success = success,
+                                message = statusMessage,
+                                color   = statusColor,
+                            })
+                        end)
                         pcall(broadcastState)
                     elseif message.type == "scan" then
                         print("[NET] Scan request from client")
@@ -3316,15 +3326,21 @@ local function main()
                             err = tostring(ok)
                             ok = false
                         end
-                        networkModem.transmit(replyChannel, ORDER_CHANNEL, {
-                            type    = "craft_result",
-                            success = ok,
-                            error   = err,
-                        })
+                        pcall(function()
+                            networkModem.transmit(replyChannel, ORDER_CHANNEL, {
+                                type    = "craft_result",
+                                success = ok,
+                                error   = err,
+                            })
+                        end)
                         smelterNeedsRedraw = true
                         needsRedraw = true
                         pcall(broadcastState)
                     end
+                    end) -- end pcall handler
+                    if not handlerOk then
+                        print("[NET] Handler error: " .. tostring(handlerErr))
+                    end
                 end
             end
         end