Evaluation kits for IAR v5.1x will probably work fine on v5.20 and later, but you need to replace SHARED\heap.c with this file:

heap.c (3KB .zip)

and rebuild. If you already tried to build the project, do a clean rebuild or just force a rebuild of heap.c and relink. Note that some of the EKs have been fixed and re-posted, as indicated on the Size & Date line.

If you have problems with the EK, email support@smxrtos.com.