From the Independent:
Iran and France cancel diplomatic lunch to welcome Hassan Rouhani after French refuse to take wine off the menuConsidering the business deals announced in the last couple days, Total in the oil fields, CMA GCM in shipping, this was a very principled call on M. Hollande's part.
Update-- The Financial Times reports:
"...this was denied by the Élysée Palace".But then they would, wouldn't they?
Diving deeper into the commercial aspects, the FT also reported:
There was even a deal to develop 25 hectares of land in Iran to produce 9,000 tonnes of tomatoes a year.