Nested Exception by generate computed column

Nikki

Hello,<br />
<br />
I am still new to Birt, sorry for asking you stupid questions!<br />
<br />
I tried to generate a computed column:<br />
<br />
select act_re_procdef.NAME_,<br />
act_re_procdef.KEY_,<br />
act_re_procdef.VERSION_,<br />
<strong class='bbc'>concat(row["act_re_procdef.KEY"], ":", row["act_re_procdef.VERSION_"]) AS PROC_DEF_ID</strong><br />
from act_re_procdef<br />
<br />
in script and caused a sql error "nested exeption"<br />
<br />
Can anybody help?<br />
<br />
Thx, greets!