Scenario 1: Memory space is below the threshold of 200mb. Please contact a Sangfor technical support representative.

Recommendation: If memory is insufficient but a customer insists on upgrading, contact Customer Service at +60 12 711 7129 (7511) to ask developers for help.

Scenario 2: CPU usage exceeds the threshold (98). Please try again later.

Recommendation: Upgrade the device again when the CPU usage is low.

Scenario 3: The update package does not meet the architecture requirements of the current environment. Please use a package that meets the architecture requirement or contact a technical support representative.

Recommendation: Obtain the upgrade package and the corresponding MD5 file based on the model of your device, and make sure that the MD5 value is correct.

Scenario 4: Upgrade failed because the current device name is invalid. Please Contact a Sangfor technical support representative.

Recommendation: Run the theme_change.sh --pattern AF script in the backend and upgrade the device again.

Scenario 5:  "Disk space is insufficient." "Please clean up disk space first."

Recommendation: Delete temporary files in the /sfdata/log/ directory and make sure that the available storage space is greater than 6 GB.

Scenario 6: Other issues

Recommendation: Call Customer Service at +60 12 711 7129 (7511) to ask developers for help.