Image Upload Fails After Capture

An upload failure occurring after the photo has been successfully captured usually indicates a breakdown in the transmission layer between the mobile device and the Smartsheet API. This can range from simple connectivity drops to complex authentication timeouts.

1. Network Timeout Analysis

Standard mobile photos can range from 3MB to 12MB. In areas with poor signal (edge/3G), the browser may time out the upload request before it completes. SmartSyncApp includes basic retry logic, but if the signal is unstable, the packet loss may exceed the browser's retry threshold.

2. Smartsheet API Rate Limits

If you are deploying a large team (50+ workers) all submitting photos simultaneously to the same sheet, you may encounter Smartsheet's API rate limits. Our queuing system attempts to mitigate this, but excessive concurrent traffic from a single API token can cause intermittent "429 Too Many Requests" errors. Expert Recommendation: For massive-scale audits, consider using multiple Smartsheet API tokens assigned to different user groups.

3. Sheet Capacity & Locking

Smartsheet prevents updates to a sheet while it is being actively "saved" or if it is under maintenance. If multiple admins are performing heavy restructuring on the target sheet while field workers are uploading, the API may reject the upload. Avoid performing sheet maintenance (e.g., adding columns, changing formulas) during peak field-capture windows.

4. Token Expiration

If the Smartsheet connection has been revoked or if the underlying account owner has changed their password, the integration token may become invalid. If uploads consistently fail for all users, navigate to the SmartSyncApp dashboard and re-authorize the Smartsheet connection to refresh the Oauth2 tokens.