Flow Runtime errors and recommendations

This article describes Flow Runtime errors and recommendations.

Applies to:   Power Automate
Original KB number:   4515139

Flow Runtime errors

• If your Flow appears to run slowly, it's likely being throttled. For more information, see Limits for automated, scheduled, and instant flows.
• If you're using the Apply to Each action, make sure you have concurrency enabled.
• If you're using variables, be aware that variables exclusively lock and will slow down loops significantly.
• If using a Dynamics 365 trigger, consider using the Common Data Service connector instead. In rare cases, Dynamics 365 triggers can take up to 2 hours to fire.

Use Custom Headers in HTTP Actions

Certain headers are removed from the HTTP Action. To pass custom headers through prepend them with X-, for example, instead of Content-Disposition, use X-Content-Disposition.