[ojAlgo-user] Error Message

[ken b. <ken...@ad...>]

I am a "newbie" to Java so I am sure this is cockpit error-------when I =
click on the downloaded Ojalgo-20=20
executable Jar file in "Bin folder" I get an error message as follows
  "Failed to Load Main class manifest attribute from     =
C\............bin\ojalgo.jar"

What do I do?