- This topic has 9 replies, 3 voices, and was last updated 8 years, 7 months ago by
Alessandro Festa.
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November 17, 2015 at 5:35 am #27818
aasif bashir dar
Participantbelow .osd file shows optimization aborted. I am unable to figure out why.
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November 17, 2015 at 7:19 am #27821
Alessandro Festa
ParticipantThe simulations runs on my computer…can you explain what error do you get?
Regards,
Alessandro
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November 17, 2015 at 7:55 am #27823
alistu
ParticipantHi Alessandro,
When you want to run the simulation, there is the option “run all optimizations” in the calculation window. When you enable this option and thn start the calculation, the line before the last line where the calculations process is being reported you can read “SPO optimization aborted”. I believe Aasif is referring to this.
Regards
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November 17, 2015 at 11:39 am #27830
Alessandro Festa
ParticipantHi Alitsu, thank for you note, I had never used that option! I am trying to run again and see why it does not work.
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November 17, 2015 at 11:43 am #27833
Alessandro Festa
ParticipantHi Aasif, I understood where the problem is.
You need to set the Result tolerance to a much lower level than 0.5, since you are using BER (which is usually very low!) as a result target.
If you try to set the tolerance to 1e-30 you should get results which make more sense.Let me know if this works.
Regards,
Alessandro
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November 17, 2015 at 11:11 pm #27845
aasif bashir dar
Participantthanks all;
Alessandro Festa i will try ur opinion,will let u know if that works for me. -
November 18, 2015 at 1:12 am #27851
aasif bashir dar
Participantur suggestion worked A. festa,thanks
but what is its significance pls xplain-
November 18, 2015 at 2:09 am #27861
Alessandro Festa
ParticipantHi Aasif, you are welcome.
Here is the explanation I think is correct: BER is a value between 0 and 1, so putting the tolerance (which is the difference between the target and the value reached during iterations) at 0.5 does not make too much sense and probably causes the optimization to not converge. A very small value like the 1e-30 that I tried instead allows for the optimization to work.
Let me know if my explanation is clear enough.Regards,
Alessandro
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November 18, 2015 at 3:06 am #27863
aasif bashir dar
Participantyes got it,thanks for ur xplaination
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November 18, 2015 at 3:55 am #27867
Alessandro Festa
ParticipantYou are welcome Aasif, happy to have helped!
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