Strange issue with custom extension and loop operator

lars_ackermann

Hi community,

 

I recently tried to run my own operator within a loop operator ("Loop Parameters"). It generates a set of strings of a particular length and amount. The loop operator is configured with different combinations of length and amount.

 

What I would expect:

Multiple sets of amount strings that fits the respective length, whereby the two parameters are different between different iterations.

 

What happens:

I only get the SAME amount of strings with the SAME length in each iteration. Additionally RapidMiner shows me a warning (StringGen is my custom operator):

Jun 7, 2017 5:53:08 PM WARNING: No such operator: 'StringGen'
Jun 7, 2017 5:53:08 PM WARNING: No such operator: 'StringGen'

If I use the StringGen operator without a loop operator it works perfectly. It simply seems to fail replacing the default parameter settings with the current configuration of each loop.

 

System:

I'm using RapidMiner Studio 7.4.000 on Windows 8 (x64). 

 

I've already searched the forum but without any success. So I would be glad if anyone at least knows this issue ;-)

 

Thank's a lot in advance!

Cheers,

Lars 

 

MartinLiebig

Dear Lars,

 

any chance we can peek into the source code? One thing i ran into was that all operators are one instance of a class. so they share the internal objects.

 

Best,

Martin