Hello Joerg
Thanks for your quick response, I really appreciate it. Sorry for the long post that follows but I feel the need to explain you as to what I am trying to model and how it is supposed to work.
If you saw my model, you would observed that the operators are all nurses and they answer calls from different beds. The reason I have the other freeoperators command (for centerport 2 which does not exist in this mode) is that in the next iteration of this model I have to add in Doctors (another set of operators that will be connected to port 2) as well. So I wrote the code beforehand and later I will simply connect the center port 2 to another dispatcher (and update the number of operators required for the concerned processes from 0 to 1) that will be connected to 2 operators called Doctors.
The way I wanted it to work is this:
Beds are grouped into clusters and each cluster shares either 1 or two nurses.
Bed 3-9 are connected to Monitor A Dispatcher which is connected to 2 nurses
Bed 10-16 to Monitor B Dispatcher which again is connected to two nurses.
Bed 17 to 20 and then Bed 21-25 are connected to Treatment and MTA dispatchers respectively each of which has one nurse.
If you look at the multiprocessor the processes are in the order:
Call nurse > Initial Nurse assessment > Call Doctor > Initial Doctor assessment> Wait time 1 > Nurse Assessment > Doctor Assessment > Wait time 2.
The ones in bold are the ones need operators in this model.
For the first 2 clusters i.e. Beds connected to Monitor A and B respectively the multiprocessor is supposed to call nurses at the "Call nurse" process utilize them till the end of Initial Nurse assessment and then free them. Since the dispatcher Monitor A is connected to the first center port hence the command
if (opnum == 2) return freeoperators(centerobject(current,1),item);
is run at the processfinish trigger in order to free the nurses.
Now the need of the model is that the same nurse should be called in again at the start of the 6th Process called Nurse Assessment and should be freed at the end of it and hence the command
if (opnum == 6) return freeoperators(centerobject(current,1),item);
Similarly in the next iteration of the model the Doctors will be called at the Call doctor process and remain utilized till Initial Doctor assessment and will be freed and then called again at the 7th process and freed again.
I dont know if it matters for the sake of this question but I will still let you know that the same item (read patient) might be routed back to the multiprocessor at the end of last process. If the patient is coming on the bed for the second or third or nth time the first 5 processes (the ones that are underlined above are supposed to be completed once per patient) will be bypassed ( by setting the process time 0 if loop >0) and the patient would only need to go through process 6 , 7, 8 and will need to call same nurse (the one which he called the very first time he came on the bed) at the start of process 6 called Nurse assessment and bed will free that nurse at the end of the process. Same case will be for Doctors if and when they are added.
What I got from your suggestion was that I should attach all the nurses which are currently attached to different dispatchers to another single dispatcher which would then be connected to the center port of all the Beds and I should run the freeoperator command on that Dispatcher only. I did not exactly get what you mean by "The next step would be to create a global variable of type tree node to the freeing dispatcher. Then you can copy the command where ever you need it." as I have not used g;obal variables yet.
I kind of get what you want me to do but I am not able to get as to how that will solve my problem. The first question though remains why is this happening at the first place (that after a while the operators go into utilize state forever even when I am running freeoperator command after each of the processes that the operators are called for)
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