startDeploy Error: Cannot Read Property 'files' in SuiteScript

The startDeploy error, specifically "Cannot Read Property 'files' of Undefined at deployData.forEach.deploy", generally arises when using the gulp theme:deploy or gulp extension:deploy commands. These commands depend on SuiteScript Restlet service requests to transfer theme and extension files to the NetSuite file cabinet. However, NetSuite's governance model imposes limits on the number of units each Restlet request can consume.

Understanding the Error

When you encounter this error, it may be due to the chunk_size setting in the gulp/config/config.json file, which determines how many files are uploaded per Restlet request. The default setting typically is 80. If your theme or extension features a complex directory structure, the upload units consumed may exceed the allowance for a single Restlet request, leading to this error.

Resolving the Issue

To mitigate this issue, consider the following strategies:

• Reduce chunk_size: Decrease this property value, especially for complex directory structures. A lower setting can help manage the upload limits and prevent governance errors.
• Test Incrementally: Adjust and test different chunk_size values to find an optimal point that balances speed and reliability.

Performance Considerations

Alternatively, if your deployment process is too slow, you might need to increase the chunk_size property. Uploading more files per request can enhance speed because it lowers the overall number of requests. Keep in mind, though, that a very high number could cause the governance error to resurface.

Conclusion

In summary, the startDeploy error is a result of governance limits imposed by SuiteScript on Restlet requests. By adjusting the chunk_size property based on the complexity of your file structure and the desired deployment speed, you should be able to resolve this error effectively.