Is your Synder sync pausing unexpectedly? This is one of the most common issues for new users, and it is almost always fixable. This guide covers 8 common causes and how to resolve each one.
How to Tell If Your Sync Has Paused
Signs your sync has stopped working:
- Transactions stay in “Ready to Sync” status and never move to “Synced.”
- Your accounting software has not received new transactions in days.
- You see transactions with “Failed” or “Canceled” status in the Platform transactions list.
- You received an email notification from Synder about sync issues.
To check, go to Platform transactions in the left-hand menu and look at the sync status column. Click Explain under any status to see details about what happened.
Cause #1: Mapping Conflicts (Unmapped Products, Taxes, or Accounts)
What’s happening: Synder encountered a transaction with a product, tax rate, or payment method that does not have a mapping configured. Rather than guessing, it marks the transaction as Failed or Canceled.
How to diagnose:
- Go to Platform transactions and look for transactions with “Failed” or “Canceled” status.
- Click Explain under the sync status — it will tell you exactly what is missing (e.g., a product that could not be found or created).
How to fix:
- Go to Settings in the left menu, select your integration at the top.
- Navigate to the Products/Services tab and add the missing product mapping.
- Click Update at the bottom of the page.
- Return to Platform transactions, select the failed transactions, and choose Actions → Sync to re-sync them.
To prevent this: Review the Settings Checklist to catch configuration gaps before syncing.
Cause #2: Accounting Software Disconnection
What’s happening: The connection between Synder and your accounting software (QuickBooks, Xero, or Sage) has expired or been revoked.
How to diagnose:
- Click the Person icon in the upper-right corner of the page.
- Select Organization settings.
- Check the accounting company connection status.
How to fix:
- Disconnect your accounting company and reconnect it from Organization settings → Accounting company.
- Log in and re-authorize Synder.
- Return to Platform transactions, select the failed transactions, and choose Actions → Sync.
Why it happens:
- QuickBooks OAuth tokens expire periodically.
- Changing your accounting software password breaks existing connections.
- Some security settings in your accounting software can revoke third-party access.
Cause #3: Payment Platform Disconnection
What’s happening: Your payment platform (Stripe, Shopify, PayPal, etc.) lost its connection to Synder.
How to diagnose and fix:
- Click the Person icon in the upper-right corner → Organization settings.
- Look at your connected integrations. If one shows as disconnected, click to reconnect it.
- Complete the re-authorization flow.
- After reconnecting, go to Platform transactions and import any transactions that were missed during the disconnection.
Cause #4: API Rate Limits
What’s happening: Your accounting software limits how many API requests can be made per minute or hour. Syncing a large batch of transactions can hit this limit.
How to diagnose:
- Click Explain under the sync status — error messages may mention “rate limit,” “too many requests,” or a 429 error code.
- Sync typically works for the first batch but stops partway through.
How to fix:
- Wait 15–30 minutes for rate limits to reset automatically.
- Sync in smaller batches — select 25–50 transactions at a time instead of hundreds.
- Synder will automatically retry after a cooldown period if you are using automatic sync.
Cause #5: Account Deleted or Renamed in Accounting Software
What’s happening: An account, product, or tax code in your accounting platform was renamed or deleted after you set up the mapping in Synder. Synder can no longer find the target, so syncs fail.
How to fix:
- Go to Settings → [Your Integration].
- Update the affected mapping to point to an active account or product.
- Click Update to save.
- Return to Platform transactions, select the failed transactions, and use Actions → Sync.
Cause #6: Insufficient Mappings for Summary Sync
What’s happening: If you are using Summary Sync mode, all required mappings must be complete before any transactions can sync. A single missing mapping will block the entire batch.
How to fix: Complete all required mappings in your settings, or contact Synder support for assistance — Summary Sync settings changes may require help from the Synder team.
Cause #7: Plan Migration Locks Auto-Sync
What’s happening: You recently migrated from a Large or Scale plan to the Pro plan. During plan migration, auto-sync is automatically paused and requires manual re-activation.
How to diagnose:
- Check your plan status under the Person icon → Organization settings.
- Look for a banner or notification about plan migration.
- Auto-sync toggle may appear enabled but is actually locked pending onboarding.
How to fix:
- Book your onboarding call with your assigned CSM — they will unlock auto-sync after reviewing your configuration.
- Alternatively, email [email protected] and mention your plan migration to request manual unlock.
- In the meantime, you can still sync transactions manually from Platform transactions → Actions → Sync.
Cause #8: Synder Auto-Disables After Repeated Failures
What’s happening: Synder has a safety mechanism that automatically disables auto-sync after a series of consecutive sync failures. This prevents your account from accumulating a large backlog of failed transactions.
How to diagnose:
- You may have received an email from Synder notifying you that auto-sync was disabled.
- Check the auto-sync toggle in Settings — it may be turned off even though you did not disable it manually.
- Look at recent transactions in Platform transactions — you will likely see a pattern of consecutive failures.
How to fix:
- Fix the underlying issue first — resolve whatever caused the consecutive failures (usually a mapping issue, disconnection, or account change).
- Re-sync the failed transactions manually to confirm the fix works.
- Re-enable auto-sync in Settings → your integration → Auto-Sync toggle.
- Monitor for the next few hours to confirm auto-sync stays active.
General Troubleshooting Steps
- Go to Platform transactions in the left menu.
- Filter by status: look for “Failed” or “Canceled” transactions.
- Click Explain under the sync status of any problematic transaction.
- Follow the guidance in the Explain details — it often includes a direct link to the relevant help article.
- After fixing the issue, select the transactions and choose Actions → Sync.
For a full list of sync statuses and what they mean, see Sync Statuses Explained.
Need Help?
If you have tried the steps above and your sync is still pausing, reach out to the Synder support team via chat or email. Include the Explain details from the affected transactions — this helps the team diagnose your issue faster.
Related articles:
- Settings Checklist: Configure Synder Before Your First Sync
- How to Review Your Synced Transactions and Fix Errors
- Sync Statuses Explained
- Product Search Priority
