Creating structure array using for loop

Hi everyone,

So I'm having some trouble populating a structure array. I found a very helpful tdms file converter on the file exchange that when I run for a data set, gives me a 1x1 structure. I have 1000 different data sets which I woud like to populate into a structure that is 1x1000. All data sets are the same size. I have done something very similare to this before but for a reason beyond me, I cannot get this to work. I have the script I am using below, any help would be much appreciated.

Num = 1000; %number of repeats

for i = 1:1000;
    s3_data(i) = TDMS_getStruct(['20190919_s3_test_',num2str(i),'.tdms']);
end

The error I am recieving is as follows:

Subscripted assignment between dissimilar structures.

Error in Process_time_dependet (line 4)

s3_data(i) =

TDMS_getStruct(['20190919_s3_test_',num2str(i),'.tdms']);

[thoughtGarden]

The error message doesn't match the line of code you are showing. Can you confirm that the code doesn't have a "1," in the line shown below?

s3_data(1,i) = TDMS_getStruct(['20190919_s3_test_',num2str(i),'.tdms']);

[Stephen23]

"All data sets are the same size..."

Sure, but do the structures have exactly the same fields? If not, you will get that error:

>> S = struct('A',{1,2})
S = 
1x2 struct array with fields:
    A
>> S(3) = struct('B',3)
Subscripted assignment between dissimilar structures.

[William Gray]

Aplogies @thoughtGarden() I had copied an error message from a previous attempt, this has been updated. Thank you for the comment.

Thank you for the comment @Stephen Cobeldick, all structures have exactly the same fields as they are test repeats,