Receiving this error when trying to create a new AI Model for this challenge "Build a Predictive Model in Model Builder"
STEPS from the trailhead:
- From the App Launcher, search for and select Data Cloud.
- In Data Cloud, click the AI Models tab to access Model Builder.
- Click Add Predictive Model. Model Builder opens.
- Select Create a binary model. Then click Next.
- Leave the default data space selected and select the Lead Data for Training DMO. This DMO contains historical lead data that your model will use for its training set. Then click Next.
However, when selecting the Lead Data for Training DMO i get this error: Requested datasource Lead_Data_for_Training__dlm not found.
The DMO exists in the org and is included in the default data space.
Anyone facing the same issue?
Hi Roberto,
This is the same category of issue as the "table not found" errors others have hit in Data 360 challenges — the DMO metadata record exists, but the underlying physical table (the __dlm) hasn't actually been materialized/refreshed yet, so Model Builder can't query it even though it shows up as selectable.
Things to check:
1. Confirm the DMO actually has data loaded. Go to Data Cloud > Data Explorer > select Lead Data for Training as a Data Model Object (not just check it exists in the Data Model tab) — if querying it there also fails or shows 0 rows, the data pipeline behind it hasn't finished.
2. Check the underlying Data Stream/ingestion status. If this DMO is fed by an ingested data stream, confirm that stream shows a completed (not "In Progress") status — Model Builder can't train against source data still being processed.
3. Wait and retry. Data Cloud provisioning and materialization can lag 15–30 minutes after a Trailhead org is issued, even if objects appear immediately in menus.
4. Try a fresh Trailhead Playground/hands-on org for this module specifically — if this org was reused or provisioned before Data Cloud fully finished setup, this is a common trigger for exactly this "requested datasource not found" error.
Reference:
https://trailhead.salesforce.com/content/learn/modules/predictive-outputs-from-model-builder/build-a-predictive-model-in-model-builderStart with Data Explorer — if you can't query Lead Data for Training there either, it confirms the DMO isn't actually populated/ready yet, not a Model Builder-specific bug.
