Hi Sriram,
Thank you for your answer.
The mentioned thread was solved finding a corrupted PlatinGUI740 jar file.
Unfortunately, this seems not to be my case: I successfully installed my PlatinGUI740_3.JAR file on Ubuntu 15.10, so I believe the jar itself should be Okay.
My issue seems instead located within 'Darwin-localstart.jar not found' and I have no clue about this.
Any help is greatly appreciated.
Thanks again and best regards,
Flavio