External procedure using shell script execute error 4424

I was attempting to create external procedure.

I used the example from vertica https://my.vertica.com/docs/7.1.x/HTML/Content/Authoring/ExtendingHPVertica/ExternalProcedures/CreatingExternalProcedures.htm

However when i execute the procedure getting error 4424 as shown below.

select helloplanet('test') ;

INFO 4427 : Procedure reported

Could not execute procedure , errno=2

ERROR 4424 : Procedure execution error:exit status=1 

Username is dbadmin