Thank you Alice!
Subclipse 1.8 installation was fine!
But anyway I got this error when I right clicked on Project / Team /Share Project /SVN
org.apache.subversion.javahl.ClientException: Unsupported working copy format
svn: This client is too old to work with the working copy at
'C:\Users\roberto.paolinelli\Progetti\CNH\SAFETY\Code\trunk' (format 31).
You need to get a newer Subversion client. For more details, see
http://subversion.apache.org/faq.html#working-copy-format-change
Since I was not able to solve the problem with eclipse I started versioning with using Tortoise SVN client.
TortoiseSVN 1.9.4, Build 27285 - 64 Bit , 2016/04/24 13:59:58
Subversion 1.9.4, -release
This SVN version is supported by Subclipse 1.12 but I'm afraid I will meet same problems as before.
I will let you know.
Best Regards
Roberto