Print/Email Orders failing with an error occured while initializing procesing

I’m trying to automatically e-mail sales orders that are open using the Print/Email Orders process.  It shows this generic error message.  I can open the sales order and click “email order” and it goes through no problem.  I can go to “print order” and then email and it shows fine as well.  It’s only when using this automated process. 

Trace Results
 

Error: At least one item has not been processed.

 at PX.Data.PXProcessingBase`1.ProcessMultipleItems[Table](PXGraph _Graph, String graphType, String stepID, List`1 steps, String action, String menu, IEnumerable parameters, List`1 src, PXProcessingMessagesCollection`1 perrowmessage, CancellationToken cancellationToken)
   at PX.Data.PXProcessingBase`1.<>c__DisplayClass78_0.<_SetProcessTargetInternal>b__3(List`1 list, CancellationToken cancellationToken)
   at PX.Data.PXProcessing`1.<>c__DisplayClass82_0.<Process>b__1(CancellationToken cancellationToken)
   at PX.Concurrency.Internal.PXLongOperationPars.PopAndRunDelegate(CancellationToken cancellationToken)
   at PX.Concurrency.Internal.RuntimeLongOperationManager.PerformOperation(PXLongOperationPars p)

Error: An invalid argument has been specified.
Parameter name: PX.Objects.SO.SOOrderProcessSelected

 at PX.Data.PXFirstChanceExceptionLogger.ProfilerFirstChanceException(Object o, FirstChanceExceptionEventArgs args)
   at IC.IC_SOOrderEntry.AddFiltersToDeactivateTranMap(PXCache cache, Object row, PXTranStatus tranStatus)
   at IC.IC_SOOrderEntry._(RowPersisted`1 e)
   at PX.Data.PXRowPersisted.Invoke(PXCache sender, PXRowPersistedEventArgs e)
   at PX.Data.PXCache.OnRowPersisted(Object item, PXDBOperation operation, PXTranStatus tranStatus, Exception exception)
   at PX.Data.PXCache`1.PersistUpdated(Object row, Boolean bypassInterceptor)
   at PX.Data.PXCache`1.Persist(PXDBOperation operation)
   at PX.Data.PXGraph.Persist()
   at PX.Objects.SO.SOOrderEntry.PersistImpl()
   at PX.Objects.SO.SOOrderEntry.Persist()
   at PX.Objects.AM.GraphExtensions.SOOrderEntryAMExtension.Persist(Action del)
   at PX.Objects.Extensions.ProcessAffectedEntitiesInPrimaryGraphBase`4.Persist(Action basePersist)
   at PX.Objects.Extensions.ProcessAffectedEntitiesInPrimaryGraphBase`4.Persist(Action basePersist)
   at PX.Objects.Extensions.ProcessAffectedEntitiesInPrimaryGraphBase`4.Persist(Action basePersist)
   at ShipHawk.SHWKSOOrderEntryExt.Persist(PersistDelegate del)
   at PX.Objects.SO.GraphExtensions.SOOrderEntryExt.CreatePaymentAPIExt.Persist(PersistDelegate baseMethod)
   at PX.SM.AUWorkflowEngine.BeforeStartOperation(PXGraph graph)
   at PX.Concurrency.LongOperationManager.StartOperation(PXGraph graph, Action`1 method)
   at PX.Data.PXLongOperation.StartOperation(PXGraph graph, PXToggleAsyncDelegate method)
   at PX.Objects.SO.SOOrderEntry.Notification(PXAdapter adapter, String notificationCD)
   at PX.Objects.SO.SOOrderEntry.EmailSalesOrder(PXAdapter adapter, String notificationCD)
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Delegate.DynamicInvokeImpl(Object[] args)
   at PX.Data.PXAction`1.RunHandler(PXAdapter adapter)
   at PX.Data.PXAction`1.<Press>d__38.MoveNext()
   at PX.Data.PXProcessingBase`1.InvokeWorkflowDrivenAction(PXGraph graph, String action, String menu, List`1 recordsList, PressActionDelegate pressAction, CancellationToken cancellationToken)
   at PX.Data.PXProcessingBase`1.InvokeAutomationActionInternal(PXGraph graph, String graphName, String stepID, List`1 steps, String action, String menu, Object record, IEnumerable parameters, CancellationToken cancellationToken)
   at PX.Data.PXProcessingBase`1.ProcessMultipleItems[Table](PXGraph _Graph, String graphType, String stepID, List`1 steps, String action, String menu, IEnumerable parameters, List`1 src, PXProcessingMessagesCollection`1 perrowmessage, CancellationToken cancellationToken)
   at PX.Data.PXProcessingBase`1.<>c__DisplayClass78_0.<_SetProcessTargetInternal>b__3(List`1 list, CancellationToken cancellationToken)
   at PX.Data.PXProcessing`1.<>c__DisplayClass82_0.<Process>b__1(CancellationToken cancellationToken)
   at PX.Concurrency.Internal.PXLongOperationPars.PopAndRunDelegate(CancellationToken cancellationToken)
   at PX.Concurrency.Internal.RuntimeLongOperationManager.PerformOperation(PXLongOperationPars p)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at PX.Concurrency.Internal.PXThreadPool.RunItem(RequestItem item)
   at PX.Concurrency.Internal.PXThreadPool.Run()
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()