Automator AppleScript action ignores input

Question

I have an Automator workflow that returns a list, an NSArray of NSStrings, in the example below "FN3", "VN3", "NN3", "organization", and "notCancelled" (sorry for the German, but I think the image is clear anyway).
This list is input to an AppleScript action, which for testing purposes simply returns the input. This AppleScript action does not ignore the input (this is indicated by the link between both actions).
Strangely, the output is an empty list:
What am I doing wrongly?

UPDATE:

I just realized the following:
When I use my own Obj-C action as input to the AppleScript action, the log file says between the end of my action, and the begin of the AppleScript action (translated): "Conversion of files/folders to files/folders terminated".
When I replace my own Obj-C action by a standard "Ask for text" action, everything works fine, and the log message before the AppleScript action says (translated): "Conversion of text to text terminated".
So, apparently, my Obj-C action returns something in the wrong format. What is the correct one?

Answer 1

I found the problem:
My Obj-C action had in its Info.plist a wrong output type specified. By default, it was:

For this reason, a conversion action tried to convert paths (which the action does not provide) to an appropriate input for the AppleScript action.

The correct setting is (in my case):

With this setting, the AppleScript action correctly outputs the input strings.