When Splash triggers a sync to Marketo, if Marketo's server does not respond within 5 seconds then the integration will time out and data will not be synced.

The error code will display in your Activity Log as "Operation timed out after 5000 milliseconds with 0 bytes received".

If you are experiencing this error, please reach out to our team with the date and time of the error to coordinate a manual re-sync.