I think they may have fixed the carto bug a couple days ago. I've been able to explore and sell with no problems.It's a none bubug since 1.05.. if you go to the game bug section there's pages and pages or people who can't sell data..
for the time being I wouldn't waste energy on exploring.
Yeah, there was no option to sell.You have to scroll right to the bottom.
I suspect that you did what i did first time. You need to target your new unexplored object and make sure the little yellow rolly icon on the left finishes and shows that it has finished the scanning process and it is in your ships computer. Only then will you have data to sell. I have been doing this for about three days now with no problems
Sorry if teaching granny to suck eggs!!
You can't sell exploration data in the same system where you explored. Go to any nearby system to sell. That's all.
.... I've tried on about 6 planets in the last 24 hours. None of them registered in the cartographic office at stations.