Alternate sequence with no "return" operation

Hello PP experts,
I have a routing with already a ALT sequence and no "branch" operation for the same, only my return oper is configured (this is a kind of converging routing).
I tried to enter an ALT sequence without a "return" operation but in this case it is not authorized.
Seams "branch" operation can be optional, but "return" is mandatory.
Can you please confirm/advise how I could simply model a "diverging" routing sequence (going out of my main routing branch and no return on it).
Thanks

Thanks for your answer but this does not solve my pb.
To me there are 2 business case which can lead to model a // or ALT sequence in addition to a main seq.
1) As per your explanation, it is a need to increase and optimize the throughput based on lot size.
OR
2) In my case it is regardless of lot size and throughput, but it is to model a manufacturing process that needs to have a main sequence for production, then based upon some process triggers, to "branch out" the main sequence and terminate this process in a different way based on those triggers results.
I already model one of my biz case where I need a main sequence on my routing, and this main seq is then joined by an ALT seq on a particular operation (my return operation). In that case usage of alternative seq with "branch oper = empty" and "return operation = 0040" is working well and fits my needs.
Seams to do the reverse, that is to leave my "return operation = empty" is not allowed.
Thanks,
Franck

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I tried with 5 ops 10, 20, 30 ,40,50 ( same work center wc1)
Set up time 1, Process time 1min for 1 pc
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set up time was 2 min for all work centers( same work center wc2) and proc time
time is 1 min for 1 pc
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sceduling type was forward
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After scheduling found that op 20 in std seq starts at 6.14am and op 40 ends
at 6.47 am where as in parallel seq op 20 starts at 6.11 am and op 40 ends at
at 6.47 am which is correct.( branch op is 20 and return op is 40)
The three minutes late start in op 20 of std seq is due to 3 minutes extra time
defined for three work centers setup time.
I also tried with alignment key 1in both std seq and parellel seq.
Kindly check that you have maintained the continous flow prodn radio button
in the same operation in both std seq and parallel seq.
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Hi all
I need to extract data on some existing parallel sequences in routings from R3. One of the fields i need is the return operation for each parallel sequence.
I was hoping the data would be in PLFL which contains most of the sequence information I need. But alas it doesn't have the return operation.
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Branch operation and return operation for routing in alternative sequence

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Hi,
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<PRE>
[valhalla:~/test] $ cat t.c
#include <string>
#include <hash_map>
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main()
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m["stl"] = "port";
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Bus Error (core dumped)
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core file header read successfully
program terminated by signal BUS (invalid address alignment)
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99 inline void STLPCALL __stl_delete(void* __p) { ::operator delete(__p); }
(dbx) where
[1] freeunlocked(0xffbee657, 0xff23a000, 0xffbee657, 0xff23a000, 0x237e8, 0xff1c291c), at 0xff1c2974
[2] free(0xffbee657, 0xffbee5d4, 0xffbee658, 0xffbee5e2, 0xffbee5e1, 0xff19bb88), at 0xff1c2924
[3] operator delete(0xffbee657, 0xffbee658, 0xffbee657, 0xff37e540, 0x13bb0, 0x1ee00), at 0xff3636f8
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[12] main(), line 8 in "t.c"
(dbx) exit
[valhalla:~/test] $ exit
exit
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/apps/SUNWspro64/bin/CC
[valhalla:~/test] $ CC -V
CC: Sun WorkShop 6 update 1 C++ 5.2 Patch 109508-09 2002/07/08
[valhalla:~/test] $ uname -a
SunOS valhalla 5.8 Generic_108528-15 sun4u sparc SUNW,Sun-Blade-100
</PRE>
STLport places all of its classes in its own _STL namespace, so there is no concern for name collision with std types that come with the Sun compiler.
Any ideas?
Regards,
Jason

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[valhalla:~/test] $ cat tt.c
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struct Y {
Y() { cout << "Y ctor" << endl; }
~Y() { cout << "Y dtor" << endl; }
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Y().foo() ;
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X ctor
X dtor
[valhalla:~/test] $ rm -rf SunWS_cache/
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[valhalla:~/test] $ a.out 1
X ctor
Y dtor
X dtor
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[valhalla:~/test] $ a.out 1
X ctor
X dtor

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Dear Guru's,
In our production process some of the operation we will perform externally by sending it to vendor. For this we are maintaining the alternate sequences in routing. So, when ever we want send the material to vendor to perform the external operation will exchange the sequence in routing.
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