[gradle] Trying Gradle build - "Task 'build' not found in root project"

I just started to read "Pro Spring MVC with web flow" and it comes with a code sample that I want to follow.

• What I want - I want to build the applications as it's done in the book, using Gradle
• What is the problem - I have never used Gradle before and when I try to execute what I'm thinking I have to I get this error Task 'build' not found in root project
• What have I done so far - Yesterday I downloaded Gradle from the official site and get it to work. Today when I actually tried to execute the steps from the book it turns out that the sample code comes with its own Gradle distribution and I executed it which I think followed to getting a second distribution of Gradle. However, I don't know if this may be a problem or not. now my directory with the sample code looks like this:

Then it's written that I have to execute ../gradlew build which I execute like this and get the following:

• What have I tried - The only thing that came to my mind was to leave only the Gradle's stuff plus the appendixA-bookstore folder in case Gradle recognize all directories as different builds but no success.
• What's the final result that I want to accomplish - First I want to figure out where is my mistake and how to build the sample application(s). And also it would be perfect if I actually can do this from my first Gradle setup which as I wrote did yesterday and what exactly should I do to use this sample code with my fresh and original Gradle setup?

run

gradle clean 

then try

gradle build 

it worked for me

Check your file: settings.gradle for presence lines with included subprojects (for example: include chapter1-bookstore )