Cannot convert undefined or null to object [workfl...
# supportv
Vapi Support Bot
05/15/2025, 7:44 AMThe "Cannot convert undefined or null to object" error in Vapi workflows usually means your code is trying to access a property of something that's undefined or null. To fix this, make sure all required objects and fields are defined before using them. For example, use optional chaining and a default value:
Copy code
tsx
const modelProvider = agent.model?.provider || 'default_provider';agent.modelVapi Support Bot
05/15/2025, 7:44 AMTo resolve the "Cannot convert undefined or null to object" error in your Vapi workflow, make sure that every variable you reference is properly defined before use.
Actionable step:
- Double-check your workflow steps to ensure all variables are initialized and not left undefined.
Tip: This error often happens when a variable is missing or not set at a certain step in your workflow.
According to the information found, defining all variables should prevent this error from occurring.
Source:
- [Discord discussion on undefined variable error](https://discord.com/channels/1211482211119796234/1329772290497318973)