Blank screen while pressing "Cancel" or "Back" button in Portal

Hi Experts,
We have a peculiar problem.
The user is trying to access time levelling report (which is a
iView) in MSS.
The user is getting the output of the report. When the user tries to press "back button" from the output screen (which is a SAP Transaction iView) the user is getting blank screen insted of report input screen.
Please suggest me some hints to resolve this.
Thanks
Abdul

I was calling details screen( screen called from ALV) using call screen in double click event. I changed this to SET SCREEN 110.LEAVE SCREEN. Now my back button in ALV screen started working as expected.
Thanks for your answers.
Joby

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Blank screen while pressing "Cancel" or "Back" button in Portal

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