Sales Order Screen - Order Number - View Only

I would guess (although I can’t say for sure) it is because Order Type and Order Nbr are key fields. It is how Acumatica designed the system to be navigated.

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You can make the Order Nbr. field read-only in the Sales Orders (SO301000) screen using a customization package in Acumatica. Here’s how:

Option 1: Use the UI Customization (Recommended)

1. Navigate to Customization > Customization Projects and create a new project or open an existing one.
2. Go to the Screens section and select Sales Orders (SO301000).
3. Find the Order Nbr. field in the layout.
4. Set the Enabled property to false.
5. Publish the customization package.

Option 2: Use a Customization Code (If UI Customization Doesn’t Work)

If you need a code-based solution, you can override the field’s behavior in the SOOrderEntry graph:

csharp  CopyEdit

public class SOOrderEntry_Extension : PXGraphExtension<SOOrderEntry> { protected void SOOrder_OrderNbr_FieldDefaulting(PXCache sender, PXFieldDefaultingEventArgs e) { sender.AllowUpdate = false; // Makes the field read-only } }

Publish the customization project, and the Order Nbr. field will now be view-only.