Errors that start with "GRN_ASSETS_" are displayed when errors relating to Image assets occur.

• Cause
  You are attempting to add a non-image file.
• Countermeasure
  Specify an image file to add and try again.

• Cause
  The number of files exceeds the limit that can be added at a time in Image Assets.
• Countermeasure
  The maximum number of files you can add at a time in Image Assets is ***.
  Reduce the number of files and try again.

• Cause
  File key, which is the required filed for the file name "***", is not set.
• Countermeasure
  Set the file key.

• Cause
  File key of the file name "***" contains invalid characters.
• Countermeasure
  File key can contain only single-byte alphanumeric characters, hyphens (-), underscores (_), periods (.), and tildes (~).

• Cause
  The number of characters of the file key of the file name "***" exceeds the limit.
• Countermeasure
  The maximum number of characters you can set for the file key is ***.
  Reduce the number of characters of the file key and try again.

• Cause
  The file key "***" already exists and cannot be used.
• Countermeasure
  Duplicate file key cannot be set.
  Specify the unique file key.

• Cause
  Cannot upload a non-image file.
• Countermeasure
  Specify an image file and try again.

• Cause
  Cannot upload a file whose size exceeds 5MB.
• Countermeasure
  Reduce the file size to the limit or less, and try again.

• Cause
  The file was specified incorrectly, or the file no longer exists.
• Countermeasure
  Retry to upload the file, and update the file again.