GetItemExtension failed error on projects screen

Hi @param2022  Can you please extend the DAC for this DAC in the RowSelected event and check once.

PMRevenueBudgetExt

@Naveen Boga This is the DAC it is a virtual field. 

public class PMRevenueBudgetExt : PXCacheExtension<PMRevenueBudget>
    {
        public static bool IsActive()
        {
            return true;
        }

        #region UsrField
        [PXUIField(DisplayName = "New Field", Enabled = false)]
        [PXString]
        public virtual string UsrField { get; set; }
        public abstract class usrField : BqlString.Field<usrField> { }
        #endregion
    }

@param2022  Can you please try below check?

     protected void RevenueBudgetFilter_RowSelected(PXCache cache, PXRowSelectedEventArgs e)
        {
            RevenueBudgetFilter row = (RevenueBudgetFilter)e.Row;
            if (row == null) return;

            foreach (PMRevenueBudget budget in Base.RevenueBudget.Select())
            {
                PMRevenueBudgetExt rowExt = budget.GetExtension<PMRevenueBudgetExt>();

                if (row.GroupByTask ?? false)
                {
                    PXUIFieldAttribute.SetVisible<PMRevenueBudgetExt.usrField>(Base.RevenueBudget.Cache, budget, false);
                }
                else
                {
                    PXUIFieldAttribute.SetVisible<PMRevenueBudgetExt.usrField>(Base.RevenueBudget.Cache, budget, true);
                }
            }
        }

@Naveen Boga I tried the code you provided there is no error. But as soon as I select the checkbox for Group by Task it unchecks itself. So that default Acumatica functionality is not working.

@param2022  Thanks for the confirmation that now you are not getting the issue related to GetItemExtension failed.

Can you please let me know what are you trying to achieve with the above code?

@Naveen Boga I want to hide my custom field from the grid when the “Group by Task” checkbox in revenue budget tab of Projects screen (PM301000) is checked. And when the checkbox is unchecked my custom field should be visible in the grid.