Error in Keyword Based Classifier

[Harshita2 (Harshita)]

I am trying out MachineLearningExtractor package.
While using Keyword Based Classifier activity, I am getting following error

-
Message: Cannot deserialize the current JSON object (e.g. {“name”:“value”}) into type ‘System.Collections.Generic.IList`1[UiPath.SmartData.DocumentClassification.Learning.KeywordLearning.ClassificationInformation]’ because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly.
Please help to get it resolved.

[AdiPopa (Adrian Popa)]

Hey,
It seems that you have an invalid learning JSON.
When first using the Keyword Based Classifier, you should start with an empty JSON file, something like [] (basically, just create a text file with just [] in it and make sure the file extension is .json).
Then, you can use the Keyword Based Classifier inside a Train Classifiers Scope to add to the empty JSON relevant information based on the output of the Validation Station.
More info on how to use the Keyword Based Classifier here: https://activities.uipath.com/lang-en/docs/keyword-based-classifier .

[Ioana_Gligan]

Hello @Harshita2 - try the sample worflow from here:

How to use Intelligent OCR activities guide and example

Hello @Jeven_Delacruz Here is a sample workflow using the IntelligentOCR 2.2.0 package. It is using multiple extractors, and the keyword based classifier. It is configured to use Abbyy AND the Machine Learning Extractor for retrieving data from invoices and receipts. Please have a look at the taxonomy manager, and at the configuration wizards for the document processing scope activities (classify document scope, data extraction scope etc). Do let me know if it works Ioana I…

Please make sure you comment out the data extraction scope - the sample also uses multiple extractors for data extraction - and focus on the Classify and Train Classifiers part to understand the setup.

Hope it helps!