One of the following errors displayed when saving a letter:
These errors could occur due to one of the following:
Ensure that the data dictionary you are using in the letter is present on the server and does not have an underscore (_) in its name.
While previewing a letter, the error “Error in loading letter: Could not import asset from XML input” appears even when a previously unpublished text asset in the letter is published.
Reset the letter cache on the publish instance using the following steps and then retry viewing the letter:
https://[server]:[port]/[contextPath]/system/console/configMgrand log in as Admin.