I know Slovenia well having flown a Seneca Five there on numerous occasions
LJLJ has to be one of the prettiest locations for an airport but surrounded by large mountains
Obviously away from the mountains the country is flatter running to the sea
All the Alps are prone to CBS rising to 35/36 K
A recent flight in a jet into Treviso which boarders Slovenia and it was a real headache finding a way in with the CBS ice can be severe
With the SSA being so high icing can be a problem at all times of the year
As he declared an Icing problem its likely thats what he had
I used to fly a PA32 for a company years back and a bad icing experience over Scotland made them change for an icing capable and approved Seneca 4
Get a machine to deal with the mission profile and a Saratoga is just a less capable Single engined Seneca