in « Sale » module i renamed « SaleOrder » model to « Declaration » model, changed everywhere,so there is no bugs,errors. then i build it and run. but in « sale » module there is still « SaleOrder » model , i mean name didn’t change. so when i click on that « SaleOrder » i am getting ERROR « ClassNotFoundException »
trying to solve it almost 8 hours , please need help.

Make sure you have deleted your previous build directories from your application before rebuilding …

i am running with ./gradlew clean build command. is it ok or i have delete manually

Under Linux, making sure to be positioned on the application directory, I frequently launch the following dangerous command:
find -iname build | xargs rm -rf