Anyone have a working example of the paging grid in a test application for versi

I have one. You can take a look at it following these steps:

1. Download the application forum.appian.com/.../68237
2. Import it in your environment. You will get 1 error indicating the Tte data source [java:/appianMySQL] cannot be reached. This is expected as most likely your data sources in custom.properties have a different name
3. Navigate to the Data Stores tab under System - Data Management
4. Open the "Autocomplete Example" data store and map it to a valid data source using the dropdown on the top
5. Publish the data store
6. Start a new instance of the process model called "Paging Grid Example" under "Process Models" - "Forum"
7. Select "Yes" in the start form so new records are added to the database
---> Select "Yes" only the first time you run the example. No need to repopulate the database every time
8. The next form will show you a list of fruits. Select your favorite ones.
9. The second form shows you another paging grid with your selection

After testing the model, when you review its implementation you will realize that I used two different approaches:

1. The first form invokes the query rule directly in the paging grid
----> This gives you an advantage: The most recent data is always displayed in the paging grid as the query rule is invoked EVERY time the task is viewed
---->Caviat: Performance wise, this is not good especially if your data is relatively static (meaning doesn't change every few minutes)

2. The second task used a node input or acp to store the result of the query rule
----> Performance wise this is better as you hit the query rule/database only once (unless you enable the "Refresh default values every time this form is viewed" option)
---->Caviat: If the data you want to display changes really frequently and you consider it can chance before the user completes the task, he/she won't get any new values that were added after this task was instantiated

When i am trying to run this example after datasource config, my task page asks me login credentials. Please see the following link
postimg.org/.../

I tried system login credentials but it didnt work

You need to make sure the property:

conf.suite.SERVER_AND_PORT

in custom.properties matches the URL you use to access Appian. In your screenshot I can see you are using localhost while conf.suite.SERVER_AND_PORT is set to something else (e.g. hmecd000240....)