Loop Repository with dates in it throws a Process failed message

User: "felix_w"
New Altair Community Member
Updated by Jocelyn

Dear Rapidminer Community, 

 

I came across a strange problem today, which I hope you can help me with.

 

I have ~200 datasets which I wanted to join beneath each other with "Append". The datasets include three colums which have dates in the format dd/mm/yyyy hh:mm in them. 

 

 

I tried to build a loop (Loop Repository) which goes through my repository and lists the data beneath each other. I used the same loop I have used previously, although the previous data didn't contain any dates. However, when I tried to loop the data I got this error message and I don't kError Message.PNGnow how to handle it. 

 

 

 

 

 

 

The strange thing is that I only get this message when I used the loop? When I simply retrieve the data and use the append operator it works fine and the data is listed below each other. 

 

Does anybody know how I can fix this problem? Because I would definitely be better to do this with a loop instead of using ~200 retrieve operators ^^ 

 

Best regards

Felix

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    User: "sgenzer"
    Altair Employee
    Accepted Answer

    hello @felix_w - welcome to the community.  Yes that is a common error message.  I have a strong hunch that when you test it with Append, your date attributes are all "Date" in the same format.  But when you Loop, there is one (or more?) example set that is NOT this way - hence kicking that error message.  It only takes one out of 200 to do this.

     

    Suggestion: try using the "Handle Exceptions" operator and some Log or Macro operators to debug so you can find out exactly which example set is causing the problem.


    Scott