A C-Map update did not work at the specified addresses, neither in Gibraltar nor in Palma! That's very weak! Was finally forced to buy new at a hefty price (it worked!). The packaging of the SVB for the small SD card is abysmal from an ecological point of view. You should work on that. Unfortunately, the protective cover for the sent SD card was retained.
I bought the card at the beginning of the summer vacation 2018 as version 2017, because I needed the coverage area and the version 2018 "still" was not available. Compared to the previously used Wide card, which had none of these errors, the result was sobering. The nautical chart partially shows land where water is, some details appear only after several times zoom out, if any, depth lines break off undefined and the further shallow water area is only shown in a blue. The plotter nautical chart combination was expressly confirmed by SVB as compatible.