Flavor not found message on Standard BACK button

All,

I have flavor to create/change/display Items for Contract. Following tabs are currently shown (T-code VA41/VA42/VA43)

1) Sales A

2) Sales B

3) Contract Data

4) Conditions

5) Partners

6) Additional Data A

7) Additional Data B

There is a need to call one of the Text Element which is normally in tab Texts by giving a button in Additional Data B.

I have a flavor to click the button in Additional Data B which will take me to the right place for Text Tab.

The problem is when I click on BACK button (Standard SAP Back) to come back to Additional Data B but i get an error as below. The confusing thing is, I dont have any script on Standard BACK button...not sure from where it is reading this script.