Subscripted assignment dimension mismatch since iteration 9

Along with saying hello and waiting for your help. I was going through folder by folder to store a specific file, I have tried to save it in a large matrix, but when I start to iterate from 9 in the for loop, it throws me an error, I copy the code that I have in the meantime.

close all, clear all, clc

a='D:\HP CIVIL\serie de tiempo\escenarios_s6_50samples';


for i=1:9
        c=sprintf('SanAntonio_S60%d',i);
    e(:,:,i)=load(fullfile(a,c,'work','pt1_zuv.dat'));
    end