Defining a procedure with cypher

Neo4j Graph Platform Procedures & APOC
1

I'm a newbie to Neo4j and trying to define a simple custom procedure using Cypher.

This link gives a tutorial for that.Custom, Cypher Based Procedures and Functions - APOC Extended Documentation

But when I try ;
CALL apoc.custom.declareProcedure('answer() :: INT','RETURN 42 as answer')

I get this error ;
There is no procedure with the name apoc.custom.declareProcedure registered for this database instance. Please ensure you've spelled the procedure name correctly and that the procedure is properly deployed.

I reinstalled APOC but didn't help. What may be causing this?

I'm using neo4j Desktop v1.5.7 and APOC v5.3.0

2

The procedure is in the "extended' set of apoc procedures. You need to add the jar for those procedures.