Issue with file upload using a Transaction iview

Hi,

We have a transactional iview based on a custom Tcode. When we try to use file upload functionality via the iview, it does not upload the file and the taskbar shows javascript error (object doesn't support this method or property).

The upload functionality in the same Tcode works fine when run directly from SAPGUI or using the GUI HTML URL.

We started getting this error after upgrading to 7.4 netweaver from 7.31.

Appreciate helpful pointers.

Thanks,

Priyanka