dos batch file find missing sequential filenames - batch-file

Question

Here is the situation, I have directories that have 10,000 files in each directory named like this:
FileName.XX0000.csv
FileName.XX9999.csv
The Size of the filename itself can change ie:
FileName.XXX0000.csv
FileName.XXX9999.csv
FileName.XXXX0000.csv
FileName.XXXX9999.csv
Where the X's are yet another parent number, but these ones should be ignored anyway.
Regardless though all directories are supposed to have exactly 10,000 files no more and no less. The trouble is some are missing and I need to know which ones are missing.
I tried the scripts in this post:
batch script to find missing sequence no
I even messed around with the string sequnce for several hours to no avail. Neither of these options works very well the 2nd script comes close but ends up in an endless loop, or spits out files that do exist.
I need to come up with a solution that will easily tell me which numbers or file names are missing. In my Dream world I would love a script where I can place it inside a parent directory and it would crawl through all the sub directories and print a single file of the missing ones.
It would be nice to not have to tell the script what the beginning part of the file name is, since in theory it should only be looking to see if the last four numbers are in existance from 0000-9999.
Since this is my first post I am hoping I doing this correctly by creating a new topic, I was going to ADD my question to the previous topic until I saw the "But avoid …" in the post box!

Answer 1

Let's see if you can write some code.
FOR /L can count from 0 to 9999
IF NOT EXIST can test if a file is missing, and it supports wild cards.
> and >> can redirect output to a file
For your dream world:
FOR /D /R %%F IN (.) will iterate an entire folder hierarchy
Edit
You probably will need to left pad a number with zeros so that the width is always 4 digits. Since this will probably be within a loop, you will want to use delayed expansion. Assume %%N is a FOR variable that contains a number.
set num=000%%N
set num=!num:~-4!

Answer 2

Here is a script that will find all the missing files in a continuous sequence:
#echo off
setlocal ENABLEDELAYEDEXPANSION
set max=1208
set cnt=0
for /L %%f in (0,1,%max%) do (
set "num=00000%%f"
set "num=!num:~-4!"
if not exist "img!num!.png" (
echo img!num!.png
set /A "cnt=!cnt!+1"
)
)
echo NUMBER MISSING: !cnt!
endlocal
Notice inside the loop you need to use !x! instead of %x% to get a local delayed variable.