Question: How to get location of a particular column , how to get count of rows present on table

```
 <TR>
    <TD>Table Data</TD>
    <TD>More Table Data</TD>
    </TR>
    <TD>More Table Data</TD>
    <TD>Table Data</TD>
    </TR>

```

consider above as a table structure

Answer: 
Step you need to follow, once launches an inapp products in your application.

* You have latest In-app Billing Version configured in application
* Apk is in published state but in beta testing or any other testing
* List the products with unique ids at play store panel
* Change the state of products to active state
* Product ids are same in source code as well in play store (double check)
* You have signed apk installed in phone
* versionCode of published apk & testing apk must be same
* you have added a tester at play store under same apk
* You need to test inapp from very same email, you have added at google play store (as tester)

once i followed all steps this error is gone. In my case it is because of tester's email :)
Possibly a caching problem with Google Play services. Clear out the cache and try again.