# CMAQ-DMv.4.0.3 Sensitivity output during simulation becomes null value from a certain moment **URL:** \ **Category:** CMAQ-DDM-3D\ **Created:** [September 4, 2023, 2:09pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349 "2023-09-04T14:09:48Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![bandaoshutiao](https://avatars.discourse-cdn.com/v4/letter/b/9fc348/32.png) [@bandaoshutiao](https://forum.cmascenter.org/u/bandaoshutiao)\ **Post date:** [September 4, 2023, 2:09pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/1 "2023-09-04T14:09:48Z")
Hello Anybody I saw someone in the community reporting this issue, but it hasn’t been resolved([Issues with CMAQ-DDMv5.4 sensitivity output - #13 by bandaoshutiao](https://forum.cmascenter.org/t/issues-with-cmaq-ddmv5-4-sensitivity-output/4236/13)). I believe this should be an occasional but real exist problem. All concentration files are correct, and the logs have not reported any errors. However, one day after the simulation started, mine was on the 10th day, O3\_ ANX starts from a certain grid point in the simulation domain to 0. As the simulation continued, after another 7 days, O3\_ BCO also began to become zero. There are also issues with other variables. Given that there were no issues with the results at first few days of the simulation, I guess my model settings should not have been wrong. ![image](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/d/d5fa1219b23ff40e737d7570c0071f6ed2a3aef4.png) ![image](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/f/f5944d00767758317b7d738585808bcf8dab4561.png) ![image](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/f/f0eaed78742a22fdeb6d0fd5e31772782bff0dfd.png) ![image](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/c/c958d5f067a02ec0c684778acc76fb4a0d0b3d1e.png) ![image](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/2/23452eb6620e5d13c2fa9a4599a992a2ec27a702.png) ![image](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/f/feda066875b5796480d28e3d8ad9214629b81156.png) ![image](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/a/ae343f29b7d92202eee4f43a8684b357ae321b7c.png) Has anyone else encountered the same problem? Do you have any suggestions? Or can I send the file to you? @sergey Ragrd shutiao ---
**Author:** ![sergey](https://avatars.discourse-cdn.com/v4/letter/s/9fc348/32.png) [@sergey](https://forum.cmascenter.org/u/sergey)\ **Post date:** [September 5, 2023, 12:32pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/2 "2023-09-05T12:32:01Z")
I have not been able to replicate this behavior on our local system here. Is there any way for you to share the INPUTS so that I may try your exact case? The best would be the smallest number of simulation days that start from clean initial conditions and progress in the the first occurrence of the problem. Sergey ---
**Author:** ![bandaoshutiao](https://avatars.discourse-cdn.com/v4/letter/b/9fc348/32.png) [@bandaoshutiao](https://forum.cmascenter.org/u/bandaoshutiao)\ **Post date:** [September 6, 2023, 8:33am UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/3 "2023-09-06T08:33:32Z")
Hi Sergey Thank you for your attention and response to this question. I shared my file on google drive, which includes scripts and input files. > **[ddm\_bandaoshutiao.rar](https://drive.google.com/file/d/1nIqBSsPUnsAw1pWQ7QX6Qp21s_RFk1OR/view?usp=drive_link)** > > Google Drive file. The script runs as follows: csh xxx 20210530 I look forward to your reply very much. If you have any questions, please feel free to contact me at any time. @sergey shutiao ---
**Author:** ![bandaoshutiao](https://avatars.discourse-cdn.com/v4/letter/b/9fc348/32.png) [@bandaoshutiao](https://forum.cmascenter.org/u/bandaoshutiao)\ **Post date:** [September 18, 2023, 4:48am UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/4 "2023-09-18T04:48:18Z")
Arfter I change exe to 5.3.2，the error will be disappear. So, I guess some change have happened between 5.4.0.3 and 5.3.2 ---
**Author:** ![sergey](https://avatars.discourse-cdn.com/v4/letter/s/9fc348/32.png) [@sergey](https://forum.cmascenter.org/u/sergey)\ **Post date:** [September 18, 2023, 3:40pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/5 "2023-09-18T15:40:05Z")
Great! So your simulation proceeds normally with the newest code? Is that correct? Sergey ---
**Author:** ![hogrefe.christian](https://avatars.discourse-cdn.com/v4/letter/h/74df32/32.png) [@hogrefe.christian](https://forum.cmascenter.org/u/hogrefe.christian)\ **Post date:** [September 18, 2023, 3:42pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/6 "2023-09-18T15:42:44Z")
@sergey, no, unfortunately I think @bandaoshutiao is encountering the problem with the newest code (CMAQv5.4.0.3), but can avoid this specific problem when downgrading to CMAQv5.3.2. ---
**Author:** ![FengLiu](https://avatars.discourse-cdn.com/v4/letter/f/49beb7/32.png) [@FengLiu](https://forum.cmascenter.org/u/FengLiu)\ **Post date:** [September 18, 2023, 10:10pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/7 "2023-09-18T22:10:48Z")
Hi Sergey and Christian, I have successfully executed CMAQ/DDM v5.2 and CMAQ/DDM v5.4.0.3 and obtained satisfactory results. In my practices, other versions of CMAQ, including CMAQ 5.3.2 with the DDM-3D, do not appear to be fully functional. CMAQ/DDM v5.4 exhibits significantly elevated higher-order sensitivities. However, these issues have been addressed and resolved in CMAQ v5.4.0.3, as seen [here](https://forum.cmascenter.org/t/cmaqv5-4-hddm-gives-too-high-second-order-sensitivity/3722/12). I do not have the problem posted here in utilizing CMAQ v5.4.0.3 with DDM-3D. Thanks. Feng ---
**Author:** ![munshimdrasel](https://avatars.discourse-cdn.com/v4/letter/m/898d66/32.png) [@munshimdrasel](https://forum.cmascenter.org/u/munshimdrasel)\ **Post date:** [September 21, 2023, 1:12am UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/8 "2023-09-21T01:12:32Z")
I am also seeing same issue with the CMAQv5.4.0.3 model and still waiting for a right solution. ---
**Author:** ![munshimdrasel](https://avatars.discourse-cdn.com/v4/letter/m/898d66/32.png) [@munshimdrasel](https://forum.cmascenter.org/u/munshimdrasel)\ **Post date:** [September 25, 2023, 9:15pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/9 "2023-09-25T21:15:06Z")
@sergey Hy Sergey, were you able to replicate the issue using the data provided above? Any suggestion would be highly appreciated. Regards, Rasel ---
**Author:** ![sergey](https://avatars.discourse-cdn.com/v4/letter/s/9fc348/32.png) [@sergey](https://forum.cmascenter.org/u/sergey)\ **Post date:** [September 26, 2023, 12:06pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/10 "2023-09-26T12:06:08Z")
I have the data locally and I will post back here when I find some time to try it out. Sergey ---
**Author:** ![sergey](https://avatars.discourse-cdn.com/v4/letter/s/9fc348/32.png) [@sergey](https://forum.cmascenter.org/u/sergey)\ **Post date:** [September 26, 2023, 6:15pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/11 "2023-09-26T18:15:34Z")
I ran this case locally and was able to trigger an instability in O3\_ANX at hour 21. The rest of my results were without error. This is different from the other case reported here, but hopefully good enough to investigate. I will try to figure out what is causing it and will report back. Sergey ---
**Author:** ![sergey](https://avatars.discourse-cdn.com/v4/letter/s/9fc348/32.png) [@sergey](https://forum.cmascenter.org/u/sergey)\ **Post date:** [September 28, 2023, 1:30pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/12 "2023-09-28T13:30:08Z")
@bandaoshutiao I found that the restart SENGRID file for the case you sent me already has bad value for some VS\* species. Here is one example from m3stat command on SENGRID: ``` Variable: SVAVB1_BVX 3-D grid statistics Max 1.30980E+22 @(c,r,l)=(172,61,20) Min -2.38146E+22 @(c,r,l)=(171,60,17) Mean -4.97627E+17 Sigma Infinity ``` Could you, please, go back further in time checking SENGRID restart files until you find a clean one? Sergey ---
**Author:** ![bandaoshutiao](https://avatars.discourse-cdn.com/v4/letter/b/9fc348/32.png) [@bandaoshutiao](https://forum.cmascenter.org/u/bandaoshutiao)\ **Post date:** [September 30, 2023, 1:47pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/13 "2023-09-30T13:47:46Z")
I am uploading file, pleasy wait a moment. ---
**Author:** ![bandaoshutiao](https://avatars.discourse-cdn.com/v4/letter/b/9fc348/32.png) [@bandaoshutiao](https://forum.cmascenter.org/u/bandaoshutiao)\ **Post date:** [October 8, 2023, 9:52am UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/14 "2023-10-08T09:52:00Z")
I’m sorry for replying so late, I was on vacation before. This is the SENGRID file which do not have bad value > **[20210525.nc](https://drive.google.com/file/d/1zfjDgk71TKKUtXkU48A9MC0ZfHeB-LS0/view?usp=drive_link)** > > Google Drive file. ---
**Author:** ![munshimdrasel](https://avatars.discourse-cdn.com/v4/letter/m/898d66/32.png) [@munshimdrasel](https://forum.cmascenter.org/u/munshimdrasel)\ **Post date:** [October 22, 2023, 6:18pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/15 "2023-10-22T18:18:57Z")
@sergey Hy Sergey, were you able to find anything on the issue? Thanks Rasel ---
**Author:** ![sergey](https://avatars.discourse-cdn.com/v4/letter/s/9fc348/32.png) [@sergey](https://forum.cmascenter.org/u/sergey)\ **Post date:** [October 24, 2023, 2:17pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/16 "2023-10-24T14:17:55Z")
I have not yet had the chance to try the new inputs, but it is my my list for this week. Sergey ---
**Author:** ![sergey](https://avatars.discourse-cdn.com/v4/letter/s/9fc348/32.png) [@sergey](https://forum.cmascenter.org/u/sergey)\ **Post date:** [October 26, 2023, 3:59pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/17 "2023-10-26T15:59:44Z")
@bandaoshutiao It is possible that the issue originates in the sensitivity treatment of the organic PM module. However, I will need your help to track it down. Could you, please, go through the sensitivity output and see when in your simulation time species relating to organic PM first begin to show unreasonable behavior. Examining only the “ANX” sensitivity is sufficient. These species are listed below. Sergey ``` Variable: MTNO3_ANX Variable: VLVPO1_ANX Variable: VSVPO1_ANX Variable: VSVPO2_ANX Variable: VSVPO3_ANX Variable: VIVPO1_ANX Variable: VLVOO1_ANX Variable: VLVOO2_ANX Variable: VSVOO1_ANX Variable: VSVOO2_ANX Variable: VSVOO3_ANX Variable: SVAVB1_ANX Variable: SVAVB2_ANX Variable: SVAVB3_ANX Variable: SVAVB4_ANX Variable: AISO1J_ANX Variable: AISO2J_ANX Variable: ASQTJ_ANX Variable: AISO3J_ANX Variable: AOLGAJ_ANX Variable: AOLGBJ_ANX Variable: AGLYJ_ANX Variable: AMTNO3J_ANX Variable: AMTHYDJ_ANX Variable: APOCI_ANX Variable: APOCJ_ANX Variable: APNCOMI_ANX Variable: APNCOMJ_ANX Variable: APCSOJ_ANX Variable: ALVPO1I_ANX Variable: ALVPO1J_ANX Variable: ASVPO1I_ANX Variable: ASVPO1J_ANX Variable: ASVPO2I_ANX Variable: ASVPO2J_ANX Variable: ASVPO3J_ANX Variable: AIVPO1J_ANX Variable: ALVOO1I_ANX Variable: ALVOO1J_ANX Variable: ALVOO2I_ANX Variable: ALVOO2J_ANX Variable: ASVOO1I_ANX Variable: ASVOO1J_ANX Variable: ASVOO2I_ANX Variable: ASVOO2J_ANX Variable: ASVOO3J_ANX Variable: AAVB1J_ANX Variable: AAVB2J_ANX Variable: AAVB3J_ANX Variable: AAVB4J_ANX Variable: AMT1J_ANX Variable: AMT2J_ANX Variable: AMT3J_ANX Variable: AMT4J_ANX Variable: AMT5J_ANX Variable: AMT6J_ANX Variable: SVISO1_ANX Variable: SVISO2_ANX Variable: SVSQT_ANX Variable: LVPCSOG_ANX Variable: SVMT1_ANX Variable: SVMT2_ANX Variable: SVMT3_ANX Variable: SVMT4_ANX Variable: SVMT5_ANX Variable: SVMT6_ANX ``` ---
**Author:** ![bandaoshutiao](https://avatars.discourse-cdn.com/v4/letter/b/9fc348/32.png) [@bandaoshutiao](https://forum.cmascenter.org/u/bandaoshutiao)\ **Post date:** [November 2, 2023, 5:29am UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/18 "2023-11-02T05:29:25Z")
Can it be accurately searched on a certain day, or should I view in all output files throughout the simulation period? ---
**Author:** ![sergey](https://avatars.discourse-cdn.com/v4/letter/s/9fc348/32.png) [@sergey](https://forum.cmascenter.org/u/sergey)\ **Post date:** [November 2, 2023, 12:12pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/19 "2023-11-02T12:12:50Z")
I would pick one of those variables and go back through the output files until you find a day that it breaks. Then, check the other variables to make sure they don’t break earlier. Sergey ---
**Author:** ![bandaoshutiao](https://avatars.discourse-cdn.com/v4/letter/b/9fc348/32.png) [@bandaoshutiao](https://forum.cmascenter.org/u/bandaoshutiao)\ **Post date:** [November 2, 2023, 1:15pm UTC](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349/20 "2023-11-02T13:15:51Z")
ok, please give me some time [Next page](https://forum.cmascenter.org/t/cmaq-dmv-4-0-3-sensitivity-output-during-simulation-becomes-null-value-from-a-certain-moment/4349.md?page=2)