Neo4j - Unknown 'toFloat' function in Cypher

I'm trying to run a cypher query where I have to compare a value stored as a String, but when I use the function `toFloat`, I get an error : ``` Unknown function 'toFloat' (line 2, column 7) "WHERE toFloat(r.acquiredValue) >= 100000" ^ ``` I'm using Neo4j 2.0.1, and according to the Neo4j Cypher Refcard, the function exists, and even by looking at the source code of the community edition, I can find that the function is written. Have you ever got this error ? How can I convert a string to float in a cypher query ? Thanks. EDIT : Here is the query trying to run ``` MATCH (profile)<-[:HAS_PROFILE]-(c:Customer)-[r:HAS_PRODUCT]->(product) WHERE toFloat(r.acquiredValue) >= 100000 RETURN c.customerId AS CustomerID, profile.code AS ProfileCode, product.name AS ProductName, r.acquiredValue AS AcquiredValue ORDER BY r.acquiredValue DESC ```