R write.dataset error

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UserBird
UserBird Dataiker, Alpha Tester Posts: 535 Dataiker

Here is my 2 lines R code (recipes)


ctg <- read.dataset("testIn")
write.dataset(ctg,"testOut")

I have the following messages and error:


[1] "Start writing table to file ..."
[1] "Done writing table to file ..."
Error in write.dataset(ctg, "testOrder") :
Unable to write dataset TRAININGPA.testOrder : RuntimeException: Session doesn't exist

Do you know where is the problem ?

Thanks

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Answers

  • jereze
    jereze Alpha Tester, Dataiker Alumni Posts: 190 ✭✭✭✭✭✭✭✭
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    Hi,

    For recipes:

    In a general way, to work with R recipes, you would need to configure R first, then a basic R recipe would be:


    library(dataiku)

    # Input dataset
    data <- read.dataset("name_dataset_in")

    # Output dataset
    write.dataset_with_schema(data,"name_dataset_out")

    For notebooks:

    It works the same way than for recipes (I also recommend using dataset_with_schema()).

    But, you need to create the output dataset first.

    Also, you should write in a managed dataset, it would prevent from some problems.

    To create a manage dataset, click on the "all dataset types..." when you create a new dataset, then you will get this screen:

    Read more about managed datasets.

  • allionep
    allionep Dataiku DSS Core Designer, Dataiku DSS Adv Designer, Registered Posts: 1 ✭✭✭✭
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    The problem only appears in notebook case. It runs inside a recipe.

    Thanks.

    Pascal
  • jereze
    jereze Alpha Tester, Dataiker Alumni Posts: 190 ✭✭✭✭✭✭✭✭
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    I updated my answer according to the details you provided. If it still does not help you, we will need the logs of your instance.
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