How to make a snap from a .jar

[oldgeek]

Hi

I have a executable .jar file inside of a .tar.

When I build and install  a snap using this .yaml:

http://pastebin.com/SDkqWFLg

It does not work and I get this fault:

/snap/highlighterpdf/x17/command-highlighterpdf.wrapper: 7: exec: 
highlighterpdf: not found

Any help gratefully received.

Gerry