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Warning about material fit range and simulation bandwidth

- November 4, 2021 at 1:02 pm
  
  chenxi.ma
  Subscriber
  
  Dear Ansys Lumerical staff,
  I run into a problem where the program prompts a warning that says "material xx uses a fit range that does not fully overlap the simulation bandwidth", as you can see in the image inserted.
- November 4, 2021 at 4:41 pm
  
  Guilin Sun
  Ansys Employee
  
  Could you please check the source frequency range and post it here please?
- November 4, 2021 at 5:58 pm
  
  chenxi.ma
  Subscriber
  
  Dear gsun, thank you very much for the quick reply. Here is a screenshot of my source parameters.
- November 4, 2021 at 6:04 pm
  
  Guilin Sun
  Ansys Employee
  
  This is a strange issue, as the material fitting is the same as the source. Please check your wall message.
- November 4, 2021 at 6:56 pm
  
  chenxi.ma
  Subscriber
  
  I'm sorry but I have no idea what exactly is the "wall message" you mentioned... Could you please explain it again? Thanks a lot.
- November 4, 2021 at 6:59 pm
  
  Guilin Sun
  Ansys Employee
  
  Click your name on screen
- November 5, 2021 at 8:47 am
  
  Stranger
  Subscriber
  
  Has this problem been resolved?
  I have the same problem and I am wondering how I can solve it.
- November 12, 2021 at 8:49 pm
  
  chenxi.ma
  Subscriber
  
  Hi Stranger, unfortunately, it hasn't been solved yet. Do you also use the latest version 2021 R2.3? Did this problem appear recently? Did it happen for some specific simulation files or all of them?
- November 13, 2021 at 12:08 am
  
  Guilin Sun
  Ansys Employee
  
  After testing, I believe it is more the display issue than the software. You can try in a different computer, or test other online examples.
- November 13, 2021 at 9:24 am
  
  chenxi.ma
  Subscriber
  
  Thank you!
- November 23, 2021 at 6:40 am
  
  elfarash
  Subscriber
  
  Hi, I have the same problem
  is there a solution? or it is not an effective problem?
- November 23, 2021 at 6:55 am
  
  chenxi.ma
  Subscriber
  
  Hi elfarash, the Lumerical staff thought it was a display error, instead of a real problem to worry about.
- March 31, 2022 at 8:47 pm
  
  jev1
  Subscriber
  
  I have the same issue with 2021 R2.3. I saw that once in a file you get a warning (because you actually do not fit the ranges correctly), then you will always see the warning afterwards.
- April 4, 2022 at 11:48 am
  
  Guilin Sun
  Ansys Employee
  
  A few users reported this issue. But I did not find it when I tried to duplicate their materials in simulation, with different newer versions.
- October 24, 2022 at 7:47 am
  
  Marylise Marchenay
  Subscriber
  
  Hello all,
  I'm trying to learn Lumerical by taking the FDTD 'My first simulation' course.
  I ran into this error right away, by simply following step by step the proposed example, if that's any help to try and track down the issue.

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