Array as a subreport link

Hi,

Crystal Report XI
MSSQL database

When I use a array as a subreport link I get an error in the formula so I wonder if this function is changed in CR XI because I think I have done as all the posts and other sites says it should be done.

In subreport A I create a array of type number.

In my main report I join this array before using it as a subreport link:
WhilePrintingRecords;
shared stringvar array StamdataArray;
Join(StamdataArray,",")

Then I pass the formula to subreport B and in this subreport I want to use this array in the Select Expert. In the Select Expert I enter this formular:
{QV_PROC_PROPS_SHORT_STRING.OBJECTID} in tonumber(split({?Pm-@Risikovurdering - Stamdata Key}, ","))

But this formula gives this error:
This array must be subscripted. For example: Array.

I have see the formula described many places (for example here:

http://www.crystalkeen.com/articles/crystalreports/joinandsplit.htm)

but maybe this is for a older version of Crystal Reports.

I hope that anyone can tell me what I am doing wrong.

Morten
Denmark