With SIMATIC WinCC V14 Image, why do you get an error message when downloading a project to a Basic Panel?
If the signature of the download does not match the signature on the Basic Panel, the project cannot be downloaded to the Basic Panel. On your Engineering Station you get the error message "Error while loading: Loading has been aborted!". On the Basic Panel you get the error message "OS Update failed.....".
The error message is only temporarily on the panel. Then the panel restarts.
The function has been implemented with SIMATIC WinCC V14. Older Images (before V14) do not have a digital signature. In order to do the download, you must switch off the digital signature check when downloading to the Basic Panel. For this, on the Basic Panel in the Start Center under "Transfer Settings > Digital Signatures", you set the "Validate Signatures" switch to "OFF".
This behavior occurs when a V14 Image with enabled signing is on a Basic Panel and a V13 Image is to be transferred to the Basic Panel (downgrade).
More information is available in the manual "SIMATIC HMI HMI devices Basic Panels 2nd Generation" in Entry ID: 90114350.