This extension gives alert when customer enters product quantity greater than stock.

it also works with options.

DEMO:
http://www.dyisol.com/opencart21/index.php?route=product/product&product_id=40
Add quantity
20000


vqmod extension
No file will replace

Also work with mijjoshop

How to install
Just need to upload "upload" directory.
No file will replace

for 3.x
admin > extension installer > upload ocmod xml file
admin > extension > modification > refresh

Support and installation is free
dyisolco@gmail.com
For instant reply please contact at whatsapp link