We are checking quality of several L1C Tiles acquired since yesterday, after the RTO (Orbit 008300 over the Brazilian coast) and find we are unable to them in SNAP. The message returned is:
No valid tiles associated to product [MTD_MSIL1C.xml]
The Tiles CAN be opened in QGIS.
A few seconds after posting here, I recieved a PDGS response to my query. It appears there was an issue in the datastripIdentifier/granuleIdentifier attributes in the MTD_MSIL1C.xml in these products.
Update The issue has been fixed for all products ingested on Tuesday 24th of January, 2016 after 11:00 UTC