After successfully training the model I get an error when trying to 'Try Model'

[apriled]

I have a model that has been successfully trained and published.
When I attempt to 'Try model' and Enter an utterance to test - I get the following error:

Exception caught in the predict call - reason: {"status":"failure","exception":"sn_ml.MLServiceUtil.predict(): java.lang.Exception: ModelInfo artifact not present for key : 5cfe17cc472c02d09fd5f3aa436d43fe_.modelInfo_2"}

[Brian Bakker]

@apriled 

Indicates the model artifact is missing for this model in table [ml_model_artifact]. Please check that any linked Vocabulary Sources (Table) are synced and then try to train the NLU Model again. If the issue persists, raise a case with Support.

[apriled]

Thanks for your response Brian. I was not able to identify the artifact and all of my vocabulary sources were synced. I opened a case with Support.

[esebasti]

Hi Apriled, we are experiencing the same issue. Just wondering what the resolution was from your case with support? Thanks

[Brian Bakker]

@esebasti 

I found the case and the issue was fixed for April. The root cause to this issue is documented in KB0861056: Clone does not preserve ML Solutions when setting property glide.platform_ml.clone_artifacts to true (Note: You need to be logged into ServiceNow Support to see this KB article).

I suspect it is missing the artifacts for the Vocabulary Source Lists associated to the NLU Model. You can either export the missing attachments on the [ml_model_artifact] records by exporting these records from the source instance to the target instance. Alternatively, you can retrain the NLU Model after removing the "solution_name" value from the [sys_nlu_vocabulary] table, where Type='Static Lookup', as follows -

 

When you have removed this value, retrain the NLU Model that is linked to the Vocabulary Source List, and it will regenerate the missing model artifacts in table [ml_model_artifact] with the new solution name. For Vocabulary Source Tables, you can manually sync them in the Vocabulary Sources module at any time, although they should be re-synced every 7 days.

Hope this helps.

Regards,

Brian