Enable UDF in Transfer screen (IN304000) on release Status - acumatica

Question

I am trying to enable an UDF in transfer screen on release status, but the UDF is not getting enabled.
May anyone help me on this issue. I have debugged the code as well, while debugging, the code is getting executed but the result is not taking any effect on the screen. I can see the cursor blinking on that field as well. Thanks in advance. Following is my Code :
namespace PX.Objects.IN
{
public class INTransferEntry_Extension : PXGraphExtension<INTransferEntry>
{
#region Event Handlers
protected void INRegister_RowSelected(PXCache cache, PXRowSelectedEventArgs e)
{
if (e.Row == null)
{
return;
}
bool shouldDisable = ((INRegister)e.Row).Hold == false && ((INRegister)e.Row).Released == true;
if (shouldDisable)
{
PXUIFieldAttribute.SetEnabled<INRegisterExt.usrExpReturnDate>(cache, e.Row, true);
}
}
#endregion
}
}
DAC FIELD
namespace PX.Objects.IN
{
public class INRegisterExt : PXCacheExtension<PX.Objects.IN.INRegister>
{
#region UsrExpReturnDate
[PXDBDate]
[PXUIField(DisplayName="Expected Return Date")]
public virtual DateTime? UsrExpReturnDate { get; set; }
public abstract class usrExpReturnDate : PX.Data.BQL.BqlDateTime.Field<usrExpReturnDate> { }
#endregion
}
}

Answer 1

The document is in released status. There are mechanisms to prevent field editing when a document is in a closed state. It is not recommended to enable fields in this situation.
To enable the fields you need to revert the mechanism blocking editing. It is often the AllowUpdate property of the data view that is used to do so but it can also be automation steps or the workflow system.
When re-enabling AllowUpdate, you need to disable and re-enable the fields:
Base.transfer.AllowUpdate = true;
PXUIFieldAttribute.SetEnabled(sender, e.Row, false);
PXUIFieldAttribute.SetEnabled<INRegisterExt.usrExpReturnDate>(cache, e.Row, true);