Unanswered questions

Dear Team,I completed 5 out of 6 courses in the Data Engineer Basics: Transform and Contextualize learning path back in January 2026. However, I am currently unable to proceed with the Data Engineer Basics: Transform and Contextualize – Assessment.The assessment is still showing as pending in my profile, and I am unable to access or start it.Could you please review my learning progress and enable access to the final assessment as soon as possible?Please refer to the attached screenshot for additional details.Thank you for your support.Mohan Narayanan

Hi,When working with an API it is possible to retrieve data as e.g. a json-file. Currently, the routines does not support this. Would it be possible for the routine to accept json-format (or other file formats) in the output? The image show that the routine fetches the data, but the string does not support it.   

Hi,We have built a Simulators Agent (Atlas AI Agent) with access to multiple Simulators Routines running through Cognite Connectors (PROSPER, GAP, and UniSim).Today, our setup consists of a single Azure VM with one instance of each simulator and its corresponding Cognite Connector installed on this VM. The environment is not auto-scalable.We have tested the queuing behavior with a single connector and observed positive results:Submitting 10 requests for the same simulator routine with different inputs results in jobs being queued, executed sequentially, and returned successfully. Launching the same routine simultaneously from 3 independent agent sessions also works without conflicts. Each session receives its results correctly.QuestionWhen we scale up to run thousands of simulations, we expect to deploy multiple instances of the same simulator and multiple Cognite Connectors of the same type.Does Cognite provide any built-in queuing, load balancing, or workload distribution mechanism a

Hi,We have some use-cases where we want an array of variables (inputs) to be passed as SET (not just one value). If I’ve understood it correctly, the routine inputs (SET) only supports one-value inputs (e.g. one temperature or pressure value).This is an example of the fields for flash calculations in WhitsonPVT. We would like to be able to do similar calculations consisting of arrays of temperature and pressures when running flash calculations through routines. Is it possible to add this feature?   

We hit an undocumented behavior of the OPC UA extractor (version 2.38.0, Docker) that we'd like to confirm.Setup: cognite.metadata-targets.clean with assets: true, timeseries: true, relationships: true, plus extraction.update fully enabled. This had been running fine for months — classic asset hierarchy plus classic time series.What we did: we added the GA Core Data Model space option to the same clean block: metadata-targets: clean: assets: true timeseries: true relationships: true space: "<our-instance-space>"What we observed:As documented, time series switched to CogniteExtractorTimeSeries instances in the space, with datapoints available via instanceId. Not documented: classic asset creation stopped entirely, even though clean.assets: true was still set. We verified this by deleting the extractor-managed asset hierarchy and restarting the extractor: after a full startup browse, no assets were recreated — no error, no failure run on the extraction pipeline, nothin

Hi team, we're seeing what looks like a backend issue on westeurope-1 during the Cognite bootcamp.Environment- Cluster: westeurope-1- Projects: cdf-bootcamp-50-prod (also observed in cdf-bootcamp-43-prod)- Time: ~14:40 CEST, 1 Sep 2026Symptom- Transformations and hosted extractors report success / Running, but no instances appear in the data model (Flows/Search is empty).- The datapoints Cognite Function fails when querying the data model:  client.data_modeling.instances.list(...) ->  CogniteAPIError: Request had 1 constraint violations ... [value must not be null] | code: 400 | cluster: westeurope-1 | project: cdf-bootcamp-50-prod  X-Request-ID: 98821131-2f58-9cb9-84bf-b1f9368e4655What we've ruled out- Same code/config works in -test.- Toolkit deploy is green; auth verified; extractors and transformations run without errors.- Instructor indicated westeurope-1 may be having issues.Question- Is there a known incident on westeurope-1 affecting data-model instance writes/reads right no

Who we areWe run a web application for industrial bakery lines that uses CDF as its back end. It's used by both plant operators and management. We're currently migrating our data models to the Core Data Model, and while doing so we've extended it with views of our own — which is what we understood a data model to be for.While migrating we've hit a case where two things we need seem to be mutually exclusive, and we'd like to know the intended pattern.What we needTranslations for some units. Not all of them — a specific set where the label carries meaning for the reader. Our headline case is throughput. We measure, depending on the line and the moment, trays per hour, where a tray may hold several products, or baguettes per hour, or products per hour. #/h is correct dimensionally but doesn't express that variety, and our users need the right word in the right language. (A secondary, milder case: length:kilom has longName: "Kilometer", and there are no accented aliases in the catalogue —

Hi Cognite Community,we currently have a Streamlit Custom App hosted directly in Cognite Data Fusion that we would like to provide to end users for an upcoming testing phase.Our plan is to let the users test the current Streamlit version first, while in parallel we are working on migrating/rebuilding the application as a Flows app.However, this migration will still take some time, while the users are expected to start testing the Streamlit application in approximately two weeks.For the testing phase, we would therefore like to provide users with a direct link to the Streamlit application, but ideally without showing the surrounding CDF navigation/sidebar (Home, Search, Canvas, Charts, Custom Apps, etc.).The goal would be something similar to a standalone/full-screen application experience while still keeping the current Streamlit app hosted and authenticated through CDF.Is there currently any supported way for Streamlit Custom Apps to:hide the CDF shell/sidebar, open the application in

I’m trying to deploy a couple of Streamlit apps into Data Fusion.  I’m getting the error “Error during booting up: Program terminated with exit(1)” in the Data Fusion editor portal.I’d swore one app was working yesterday and I was able to publish, but both apps are giving this error in the editor portal.  I can publish, but I get the same error in Flows when trying to run the custom app. I’ve tried researching and it says to look at the logs, but I don’t see a way to view any log details.Any thoughts on how to debug this? 

To all the experts out there,When parsing a diagram, some annotations may be incorrectly assigned and overlap with the correct ones. For example, "Pump A-1" is correct, while "Pressure Gauge A-1" is incorrect.I want to reject the incorrect "Pressure Gauge A-1" annotation, but I cannot select it because it completely overlaps with the correct "Pump A-1" annotation. As a result, I cannot select and reject the annotation I want to remove. First of all, it is difficult to tell at a glance which annotations are overlapping, as the only indication is a slightly darker color. The annotations I pointed out below are overlapping.I would like it to work like Explorer, as it used to.

I have a workflow that runs subwork flows. In the main workflow, each of the subwork flow tasks is set to ‘skipTask’ on failure. The tooltip notes that the task will be marked as COMPLETED_WITH_ERRORS. However when this happens all I can see for status is ‘Completed’ and no email notification is being set out.What I want is for my workflows to continue to run if a specific portion fails, but I still want the email notification to be sent to notify me that there is an issue.

Hello, We need to expose our CDF data to a Microsoft Power Apps.The official documentation only covers Power BI and Excel connectors. I found this older thread from 2022 describing how to build a custom connector: https://hub.cognite.com/other-419/how-to-build-a-connector-for-cdf-in-power-apps-cognite-official-1253Few questions:Is there now a native/official CDF connector for Power Apps, or is a custom connector still the only path? If so, is the approach in that thread still valid for current CDF API versions? Any known limitations (authentication, data volume, API compatibility...) to be aware of?Any guidance or pointers to up-to-date documentation would be appreciated.

The latest version of the Grafana connector supports unit conversion when CogniteUnit is defined. However, I’m not able to add the target unit to the label. I can add the defined unit using {{unit}}. Using the “Query Inspector” I see that the target unit is returned in the data object via the unitExternalId, but I cannot display it using {{unitExternalId}}.   Resulting legend Query inspector resultsI notice that some of the properties can be shown, like type and isStep, but I assume it is because I get it directly from the timeseries instance?Any suggestions to how we can add the target unit (without having to manually write it to the label)?

Hi,I have a Unisim connector and I am trying to parse a Unisim model with several flowsheets. It works when the model only have one flowsheet, but not when it has several. Is it possible to work with Unisim models containing several flowsheets?

Hi,I have two nearly identical PROSPER models for two oil producers (A-13 and A-11) on the same oilfield. The model structure is essentially identical: same well type, same configuration, same parameters, etc. The only differences are the actual values (for example, well-specific data such as gauge depth). QuestionSince the corresponding Simulator Models are nearly identical, is it possible to create one Simulator Routine that can be executed against multiple models?Ideally, I would like to maintain a single routine and simply select which model to run, perhaps through a variable or parameter (for example, a "Model" input/SET variable).I would like to avoid creating and maintaining two identical routines, one for A-11 and one for A-13, as this creates unnecessary duplication and makes maintenance and governance more difficult.Could you please advise on the recommended approach for running a single routine against multiple simulator models? If the approach I described is not supported,

Hi everyone, in the "Debugging in Data Modeling" course in Cognite Hub, one of the prerequisites is to load an already built Data Workflow "wf-rmdm" and run it to instantiate "RMDM" with instances. The course indicate that the workflow should be deployed and then run to be able to perform the next steps. I have loaded successfully the Data workflow, however, when trying to run it as suggested in the course, I get the following error message "Workflow could not be run". The course suggests the workflow should be successful. I do not know where to find more detailed logs about this error. The expected tables are loaded as well as all the Transformations. Any idea on how to overcome this situation ?  

Hello!We have encountered some issues with backfilling on the PI Extractor. This usually goes automatically, and works fine. However, we do now have a 2 day gap in data on Cognite, however all that data is present in PI.Are there any way to “force” a backfill, or fix this issue somehow?Thanks!

Current stateWe use Cognite Simulator Connectors to run simulations.To run a simulation, a model must first be available in the Simulator Models list. Today, this is done through a data engineering process where a simulation file (for example, a PROSPER or UniSim model) is ingested into CDF as a simulator model. Once the model is available, a Routine can be created and executed against it. Possible future stateWe are considering storing simulation files directly in Cognite Data Models (they are not stored there today, but we can develop an ingestion pipeline ingesting these files from the sources and into Cognite Data Models). For example, simulation files could be associated with a Cognite Asset, such as 10-WELL-08:QuestionIf these simulation files are stored in Cognite Data Models, can they be used directly when executing Simulator Routines?Or do the files still need to be imported/copied into Simulator Models’ list before they can be used by the Cognite Simulator Connectors?

Hello,I have a user who is interested in seeing a rolling total of a value within our Cognite instance. We have created a chart where we have a very simple setup of the data point we are interested in seeing over time, and a 30 day sliding window integration function on it, which is working fine and showing the value within the chart as needed. However, we are also interested in writing this data to another time series and then being able to display the current value of this time series on a canvas using the Live data point mode. I saved & scheduled the calculation to run daily within the Chart but the scheduled calculation and the time series which it created is getting no data, with no errors anywhere that I can see. Is this something that is possible to compute within Charts?