Can I stop FiledUpdated event from being called?

Can you post your code from your VS project where you are setting those field values?

        protected void _(Events.FieldUpdated<PMRevenueBudget, PMBudgetExt.usrUnitCost> e)
        {
            PMRevenueBudget row = e.Row;
            PMBudgetExt rowExt = row.GetExtension<PMBudgetExt>();
            if (rowExt.UsrMarkUp.HasValue && rowExt.UsrUnitCost.HasValue)
            {
                decimal? markup = rowExt.UsrMarkUp / 100;
                if (rowExt.UsrUnitCost < 0)
                    throw new PXSetPropertyException(ProjectUnitCostAndMarkUp.Messages.NegativeUnitCost);
                decimal? unitPrice = rowExt.UsrUnitCost / (1 - markup.Value);
                e.Cache.SetValue<PMRevenueBudget.curyUnitRate>(row, unitPrice.Value);
                decimal? budgetedAmount = unitPrice.Value * row.Qty;
                e.Cache.SetValue<PMRevenueBudget.curyAmount>(row, budgetedAmount.Value);
                e.Cache.SetValue<PMRevenueBudget.curyRevisedAmount>(row, budgetedAmount.Value);
            }
        }

        protected void _(Events.FieldUpdated<PMRevenueBudget, PMBudgetExt.usrMarkUp> e)
        {
            PMRevenueBudget row = e.Row;    
            PMBudgetExt rowExt = row.GetExtension<PMBudgetExt>();
            if (rowExt.UsrMarkUp.HasValue && rowExt.UsrUnitCost.HasValue)
            {
                decimal? markup = rowExt.UsrMarkUp / 100;
                if (markup >= 1)
                    throw new PXSetPropertyException(ProjectUnitCostAndMarkUp.Messages.MarkupToLarge);
                if(markup < 0)
                    throw new PXSetPropertyException(ProjectUnitCostAndMarkUp.Messages.NegativeMarkUp);
                decimal? unitPrice = rowExt.UsrUnitCost / (1 - markup.Value);
                e.Cache.SetValue<PMRevenueBudget.curyUnitRate>(row, unitPrice.Value);
                decimal? budgetedAmount = unitPrice.Value * row.Qty;
                e.Cache.SetValue<PMRevenueBudget.curyAmount>(row, budgetedAmount.Value);
                e.Cache.SetValue<PMRevenueBudget.curyRevisedAmount>(row, budgetedAmount.Value);
            }
        }


        protected void _(Events.FieldUpdated<PMRevenueBudget, PMBudget.curyUnitRate> e)
        {

            PMRevenueBudget row = e.Row;
            PMBudgetExt rowExt = row.GetExtension<PMBudgetExt>();
            decimal? markUp = 0;
            if(row.CuryUnitRate.HasValue && rowExt.UsrUnitCost.HasValue)
            {
                if(row.CuryUnitRate.Value != 0)
                {
                    markUp = 1 - (rowExt.UsrUnitCost.Value / row.CuryUnitRate.Value);
                }
            }
            e.Cache.SetValueExt<PMBudgetExt.usrMarkUp>(row, markUp.Value * 100);
        }

@ddunn thanks for your help.

I just removed the line you said and replaced it with this line:

rowExt.UsrMarkUp = markUp * 100;

And it seems to be working perfect now.

I’m new to acumatica and don’t understand what you mean by this: theGraph.Transactions.Update(row);  or theGraph.Document.Update(row);

Is theGraph PMRevenueBudget, PMBudgetExt or something else?  

I’m reasonably new, too. 

In your case the graph will be Base because you’re within a a graph extension.