Rayleigh correction of MERIS error

Optical Toolbox
#1

processing: snap -optical-preprocessing-rayleigh correction

data： MER_FR__1PNUPA20050508_024226_000000982037_00075_16662_1971.N1
snap error：An internal error occurred during the target product initialisations.
Type: IllegalArgumentException
Message: The Product ‘MER_FR__1PNUPA20050508_024226_000000982037_00075_16662_1971.N1.rayleigh’ already contains a tie-point grid with the name ‘dem_alt’.

#2

Probably you don’t have the latest version:
https://senbox.atlassian.net/browse/SIIITBX-150
This is fixed since quite some time.
You should get the latest version from the download page and after the installation check for updates (menu: Help / Check for Updates).