problem in loading .mat file (Error using load)

Question

Tae Lim 2019-6-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/467972-problem-in-loading-mat-file-error-using-load

编辑： per isakson 2019-6-22

Hi,

I am having a trouble loading a particular mat file in Matlab.

I have close to 30 mat files that I consecutively generated using one script (script A). I am loading each of these mat file in another script (script B) for further analysis. When I try to load one particular mat file in script B, I get the error that looks something like this:

Error using load

Cannot read file C:\Users\....\Filename_SC7_... .mat.

'SC7' indicates the 7th file I am reading. All mat files that I load have the same name scheme with the value following SC changing (e.g. ...SC1....mat, ...SC2....mat) I suspected the file being corrupt and regenerated the file but I am still getting the same error message. I used script A and script B before without any troubles in the past so I am not sure why I am getting this issue now. Pretty much the only thing I changed this time is the name scheme, but I have used similar name schemes in the past as well.

Any comments will be appreciated!

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Tae Lim 2019-6-21

编辑：Tae Lim 2019-6-21

在 MATLAB Online 中打开

Stephen, please see my answers to your questions below:

how are you generating the filenames?

-> My script iteratively runs the code to generate results using for loops. Filename is generated at the beginning of the each iteration using the code below

ResultMatName = strcat('.\Results\Util_20181111_Tgt0.7\Util_Tgt',num2str(reduction_target),'_SC',num2str(run),'_dr',num2str(discountrate),'_20181111_test2.mat');

As you can see, the name of the file updates according to the values I assign to the variables. the variable 'run' updates at each iteration from 1 to 27 using for loop.

Under the folder where I save result files, I have a totall of 27 mat files whose name liik like below

Util_Tgt0.7_SC1_dr0.07_20181111
Util_Tgt0.7_SC2_dr0.07_20181111
...
Util_Tgt0.7_SC27_dr0.07_20181111

They are all generated by running a single script that iteratively generates these 27 files. All of them open without problem except for the 7th file, whose name is 'Util_Tgt0.7_SC7_dr0.07_20181111'

As I look into the problematic file further, I noticed that the file becomes un-loadable in the middle of the script run. I was able to check the saved data in the file as I ran the script and didn't notice any error or weird things.. All data and data structure is still in the file. I just cannot load them afterwards.

Below I am sharing two version of the problematic ''Util_Tgt0.7_SC7_dr0.07_20181111.mat'. They are saved at two different points of the script run. Upon successful script run, this file will contain 37 sets of data; each set is iteratively generated. The first file contains first two sets of data and still opens. The second file contains first three sets of data and at this point becomes un-loadable. So this problem basically occurs upon or before saving the thrid set of data to the result file.

1) https://umich.box.com/s/3ax37pt7pw7bu41divu798jcohcgz5aa

2) https://umich.box.com/s/i85zay5nco0hfc8nwjgxxxrmv7kx15q4

I appreciate all of your help!

per isakson 2019-6-21

https://umich.box.com/s/i85zay5nco0hfc8nwjgxxxrmv7kx15q4 takes me to

Tae Lim 2019-6-21

per isakson, I just fixed the issue. You should be able to access the file now. Thank you for pointing this out!

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Answer 1

per isakson 2019-6-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/467972-problem-in-loading-mat-file-error-using-load#answer_380305

在 MATLAB Online 中打开

On Win10, R2018b I have

downloaded your two files from Box successfully
dragged the 'Util_Tgt0.7_SC7_dr0.07_20181111_test2_FirstThreeSets_UNloadable.mat' from the Current Folder pane to Workspace pane. Load failed. Interactive Open also failed

         >> load('Util_Tgt0.7_SC7_dr0.07_20181111_test2_FirstThreeSets_UNloadable.mat')
        Error using load
        Cannot read file H:\m\cssm\Util_Tgt0.7_SC7_dr0.07_20181111_test2_FirstThreeSets_UNloadable.mat. 
        

dragged the 'Util_Tgt0.7_SC7_dr0.07_20181111_test2_BAUonly.mat' from the Current Folder pane to Workspace pane. Load successful. Peek at Results

        >> Results.BAU
        ans = 
          struct with fields:
                              newbau: [14×96 double]
                          deadtotbau: [14×96 double]
                              retbau: [14×60×96 double]
                           rettotbau: [14×96 double]
                              totbau: [14×96 double]
                      CostNewCap_bau: [14×96 double]
                     CostNewFuel_bau: [14×96 double]
                    CostNewMaint_bau: [14×96 double]
                         CostRet_bau: [14×96 double]
                     CostOldFuel_bau: [14×96 double]
                    CostOldMaint_bau: [14×96 double]
                          newbau_cap: [14×96 double]
                      deadtotbau_cap: [14×96 double]
                       rettotbau_cap: [14×96 double]
                          totbau_cap: [14×96 double]
                                Ebau: [96×1 double]
            linear_emcon_of_interest: [96×1 double]
                     EVcharegeEFsbau: [96×1 double]
                         retbyagebau: [96×60 double]
                TotPrimaryEnergy_bau: [14×96 double]
                      CFnewPriE_Util: [14×96 double]
                      CFoldPriE_Util: [14×60×96 double]
                              oldbau: [14×60×96 double]
                             deadbau: [14×60×96 double]
                        discountrate: 0.07
                   totUtilcostmatbau: [96×3 double]
                                xbau: [81984×1 double]
        >> 
         

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per isakson 2019-6-21

编辑：per isakson 2019-6-21

在 MATLAB Online 中打开

I've downloaded and loaded "FirstTwoSets" successfully.

>> load('Util_Tgt0.7_SC7_dr0.07_20181111_test2_FirstTwoSets.mat')
>> Results
Results = 
  struct with fields:
        BAU: [1×1 struct]
    CAY2015: [1×1 struct]
>> 
>> Results.CAY2015
ans = 
  struct with fields:
                         new: [14×96 double]
                     deadtot: [14×96 double]
                      rettot: [14×96 double]
                         tot: [14×96 double]
                  CostNewCap: [14×96 double]
                 CostNewFuel: [14×96 double]
                CostNewMaint: [14×96 double]
                     CostRet: [14×96 double]
                 CostOldFuel: [14×96 double]
                CostOldMaint: [14×96 double]
                     new_cap: [14×96 double]
                 deadtot_cap: [14×96 double]
                  rettot_cap: [14×96 double]
                     tot_cap: [14×96 double]
                           E: [96×1 double]
                        Ebau: [96×1 double]
    linear_emcon_of_interest: [96×1 double]
                       AnnEm: [14×96 double]
                  E_Captured: [96×1 double]
                 EVchargeEFs: [96×1 double]
      incrUtil_costs_by_type: [96×3 double]
         incrUtilcostsyearly: [96×1 double]
                    retbyage: [96×60 double]
            TotPrimaryEnergy: [14×96 double]
              CFnewPriE_Util: [14×96 double]
              CFoldPriE_Util: [14×60×96 double]
                         old: [14×60×96 double]
                        dead: [14×60×96 double]
                         ret: [14×60×96 double]
              totUtilcostmat: [96×3 double]
                           R: [36×27 double]
                    exitflag: 1
                           x: [81984×1 double]
               E_annualReduc: 0.010505
>> 

per isakson 2019-6-21

编辑：per isakson 2019-6-22

I've no good proposals, however

In the File Exchange there are a few submissions that read mat-files with Java. See tag:"mat-file" . Maybe, one of these fails and returns a useful error message.
Save your data to a mat-file version 7.3. See MAT-File Versions. Try to read the mat-file with HFD5. Start with h5disp - Display contents of HDF5 file
Contact tech-support (if your license includes support)

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problem in loading .mat file (Error using load)

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problem in loading .mat file (Error using load)

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