The Altair Community is migrating to a new platform to provide a better experience for you. The RapidMiner Community will merge with the Altair Community at the same time. In preparation for the migration, both communities are on read-only mode from July 15th - July 24th, 2024. Technical support via cases will continue to work as is. For any urgent requests from Students/Faculty members, please submit the form linked here.

Loop collection operator

Mohamad1367Mohamad1367 Member Posts: 22 Contributor I
edited May 2020 in Help
hi .. Does anyone know what is the cause of this error?


  • Options
    Telcontar120Telcontar120 Moderator, RapidMiner Certified Analyst, RapidMiner Certified Expert, Member Posts: 1,635 Unicorn
    The problem is inside your Loop Collection operator because it is not returning any outputs.  You will need to open that up and see what is causing the problem.  Perhaps you are not actually delivering a collection for it to loop over?
    Brian T.
    Lindon Ventures 
    Data Science Consulting from Certified RapidMiner Experts
  • Options
    Mohamad1367Mohamad1367 Member Posts: 22 Contributor I
     thank you @Telcontar120 when i open loop collection operator i see a window like this photo..are you know where is the problem?
  • Options
    lionelderkrikorlionelderkrikor Moderator, RapidMiner Certified Analyst, Member Posts: 1,195 Unicorn
    hi @Mohamad1367,

    As said in your other thread, you have to put your text processing steps INSIDE the Loop Collection operator.
    Thus put your Filter Stopwords operator  INSIDE the Loop Collection operator.

    Hope this helps,


Sign In or Register to comment.