BI4 OpenDocument Null Parameter

With the release of BI4 there have been a few changes to the structure of OpenDoc URLs in business Objects 4.0. 

Crucially a lot of people would need to pass Null Value into a report for a required parameter. This used to be just a case of entering no value or the text Null, but that no longer seems to work in BI4. 

To get around this, you can now pass the ASCII Value %00 instead of Null.

For Example 

&lsSProductName=%00

Perhaps this will change in the future, but for now this has worked.