Epson Job Status Code 350
On the WorkForce Pro WF-C878R/WF-C879R job-status platform, code 350 identifies a secure destination / certificate condition. The job type matters because Epson reuses nearby numeric ranges for different scan and forwarding functions.
Error meaning
An FTPS/HTTPS certificate validation error occurred.
This meaning is tied to the reviewed family/platform and subsystem below; do not reuse the number by itself on a different printer family or protocol.
Applies to
Epson WorkForce Pro WF-C878R/WF-C879R job-status platform
- WorkForce Pro WF-C878R
- WorkForce Pro WF-C879R
Common formatting
These are formatting/lookup aliases for this reviewed condition, not separate error pages.
- 350
- Epson 350
- WF-C878R 350
- WF-C879R 350
What usually causes it
- The FTPS/HTTPS certificate cannot be validated.
- The printer date/time/time zone may make a certificate appear invalid.
- A required root/CA certificate is missing, expired, or replaced.
What to try
Correct date, time, and time zone
Certificate checks depend on the device clock.
Review trusted certificates in Web Config
Install/update only the root or CA certificates required for the destination.
Check the server certificate
If it was recently renewed or replaced, confirm the printer trusts the new chain.
Retry the same secure destination
Do not disable validation just to clear the code.
After each corrective action
Retry the same operation that produced 350. If it now works, stop there rather than changing unrelated printer, network, or service settings.
If the code returns
A repeated 350 after time and trust-store checks needs certificate-chain review by the server/device administrator.
When service may be needed
The checks above stay at the user/admin configuration level. If the setting is controlled by an organization, use the administrator rather than bypassing security or certificate requirements.
Continue with guided troubleshooting
If the printer still is not working after the reviewed checks, carry this verified error context into the guided troubleshooter.
Related information
Verified source
Official Epson WF-C878R Job Status Error Codes FAQ, corroborated against the WF-C879R User's Guide for the same code table.