bonita 6.3.6 subscription performance group widget list iteration index

Unable to install apps

when i try to install a .bar file into bonita perfomence 6.3.6 i got:
This field file format is not allowed. Only ".bar" .
it had worked fine last year and my profile is administrator

error from bonita.log

2017-10-18 14:32:02 org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/bonita].[themeResource]
GRAVE: Servlet.service() for servlet [themeResource] in context with path [/bonita] threw exception [null] with root cause Connection reset by peer: socket write error

Get values while looping through duplicated group to have conditional displaying of widgets inside the duplicated group

Hi All,

I have a group widget on my template that is set with the posibility to be duplicated. All works fine when filling the group with a list.

Depending on the values passed to the group via the list I want some widgets inside the group not to be displayed. So for this specific widget I would like to fill in a value under "Insert widget if".

How do I get the current index where the iterator is OR is there a way to get the valiues of the current position of the iterator in some way?

Best regards, Steven