1. You said "The previous DOM task displays as Interrupted in the Process Instance", so the timer actually interrupt the attached user task "DOM" right?
   
   Yes
    
2. The issue is that the parallel merge gateway "Logistics Merge 2" does not work as expected right?
   
   Correct. After an approval or timer triggered at DOM, DOF or DSQ User Task, the process ends without error, nor does it proceed to "Logistics Merge 2". 
   
   If I delete the attached timer events from DOM, DOF and DSQ then the process progresses to "Logistics Merge 2" and "YYT Logistics Review"
    
3. It's because there are 6 inflows for the "Logistics Merge 2" parallel gateway, so it will wait for 6 inflows then it will process to next step. 
   
   But isn't that the purpose of the Attached Timer Event with Interrupt the attached activity enabled? No matter what occurs, with Interrupt the attached activity enabled on the 3 timers, there is in reality only 3 inflows to "Logistics Merge 2"?
   
   Also, there are 6 inflows to the Director Merge gateway after the "Initial Entries" stage. 
    
4. You can change the "Director Merge 2" and "Logistics Merge 2" to inclusive gateway as "Director Merge": so the "Logistics Merge 2" will be completed when the inflows actually reach to it equals the outflows of "Director Merge 2".
   
   I'm confused. Are you saying that between 2 gateways, the outflow and inflow must be equal?

Either way, I made the changes you suggested and I still do not progress to "Logistics Merge 2" and now the process shows as "Terminated" without an error log.

The Forms Event Viewer states:

EventData>

  <Data>An unexpected error has occurred. [LFF502-UnexpectedError] Details: URL: Error: UnexpectedError Date: 5/17/2016 10:56:25 AM (Newfoundland Standard Time) HTTP Status Code: 500 Stack Trace: Caught exception: Laserfiche.Forms.CommonUtils.Exceptions.LFFormsException Message: An unexpected error has occurred. [LFF502-UnexpectedError] Inner exception: System.Collections.Generic.KeyNotFoundException Message: The given key was not present in the dictionary. at Laserfiche.Forms.Routing.Gateway.AddNewConvergingProcessInstance(Int32 instanceId, SequenceFlow seqFlow, IRoutingContext routingContext) at Laserfiche.Forms.Routing.FlowObject.GetAllSubsequentSteps(Int32 instanceId, IRoutingContext routingContext) at Laserfiche.Forms.Routing.InclusiveGateway.TryMerge(cf_bp_worker_instances processInstance, IRoutingContext routingContext) at Laserfiche.Forms.Routing.FlowObject.UpdateInclusiveMergeSteps(cf_bp_worker_instances instanceInMergeContext, IEnumerable`1 inclMergeSteps, IRoutingContext routingContext) at Laserfiche.Forms.Routing.RoutingContext.GetAllSubsequentRoutingSteps() at Laserfiche.Forms.Routing.RoutingDispatcher.GetSubsequentRoutingStepList() at Laserfiche.Forms.Routing.RoutingDispatcher.ExecuteSteps() at Laserfiche.Forms.Routing.RoutingEngineService.RunRouting(RoutingRequestParameters requestParam) at Laserfiche.Forms.Routing.RoutingEngineService.<>c__DisplayClass1.<StartRouting_Async>b__0()</Data>

  </EventData>

For parallel gateway, parallel split and parallel merge need to be used as pair. And the number of parallel split outflows and number of parallel merge inflows need to match.  The parallel merge gateway will wait all the inflows connect to it to has input, then it will go to next step; For inclusive gateway, inclusive split and inclusive merge need to be used as a pair. And the outflows actual taken from inclusive split and inflows actual reach inclusive merge gateways need to match.

At which step did you get the error? At "Logistics Merge2"?

 I created a similar process and the process can go to End event after the inclusive merge:

Please open an support case with exported XML for the process if you still can reproduce this and we need to know which paths are taken when get this error.

Yes, the error seems to have occurred at Logistics Merge

You stated: "I created a similar process and the process can go to End event after the inclusive merge:"

• Why would you go to an End Event after a merge? Place a user task after the Inclusive Gateway and let me know what happens.