sry i can not well english everyone understand me 
i write binary script to top picture code
first Loop, well done
but second Loop entering, top picture highlight blue bar execution after, stop test case,
I search the console log, but not found exception and fail log,
plz everyone tell me suggestion,
my head hot-steam for that’s problem
thx u for reading
I solved the problem.
that is.
Org.open qa.selenium.StaleElementReferenceException foundation reference : element is not attached to the page
(Reference url : /documentation/webdriver/troubleshooting/errors/)
This exception does not log if a non-catalon library is used.
The reason for this exception is
When the page was refreshed, the referenced object was destroyed.
(That means getting a new dept3list)
A get a new dept3List
the loop works normally.