DevHeads IoT Integration Server•3w ago

Fixing 'Missing Operator' Error in Batch Script for Renaming JPG Files on Windows

I'm trying to rename image files (JPGs) on a Windows machine. I want to add an incrementing number (e.g., file1.jpg, file2.jpg, etc.) to each filename. I wrote a batch script using a loop, but I'm encountering a 'Missing operator' error. Here's the relevant part of the script:

setlocal EnableDelayedExpansion
set filename=file
set counter=0
for /f "usebackq delims=*" %i in (`dir /b *.jpg`) do (
    set /a counter+=1
    ren "%i" "%filename%!counter!.jpg"
)

setlocal EnableDelayedExpansion
set filename=file
set counter=0
for /f "usebackq delims=*" %i in (`dir /b *.jpg`) do (
    set /a counter+=1
    ren "%i" "%filename%!counter!.jpg"
)

Can anyone help identify the issue causing the error? @Middleware & OS

6 Replies

Dtynin•3w ago

In batch scripting use double exclamation marks as in !! to expand your variables within arithmetic operations. Lemme give you a fix:

ren "%i" "%filename%%counter!!%.jpg"

ren "%i" "%filename%%counter!!%.jpg"

It's just syntax error @Sterling

Sterling•3w ago

Okay, okay... Thanks very much @Dtynin

Enthernet Code•3w ago

@Sterling The issue causing the Missing operator error is that when you're running the bash script in a command prompt window, you need to use double percent signs %% for the loop variable %i.

Sterling•3w ago

Alright, I will take note of that. Thanks @Enthernet Code

Marvee Amasi•3w ago

Yh something like this

setlocal EnableDelayedExpansion
set filename=file
set counter=0
for /f "usebackq delims=*" %%i in (`dir /b *.jpg`) do (
    set /a counter+=1
    ren "%%i" "%filename%!counter!.jpg"
)

setlocal EnableDelayedExpansion
set filename=file
set counter=0
for /f "usebackq delims=*" %%i in (`dir /b *.jpg`) do (
    set /a counter+=1
    ren "%%i" "%filename%!counter!.jpg"
)

youcef_ali•3w ago

Select all the file you name in explorer put the header you want, it will be incremented auto

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Fixing 'Missing Operator' Error in Batch Script for Renaming JPG Files on Windows