= Welcome to the CAPE-OPEN Logging and Testing Tool (COLTTĀ° development site = COLTT is used to track communication through CAPE-OPEN interfaces between a Process Modellig Component and a Process Modelling Environment. COLTT is developed and maintained by the CAPE-OPEN Laboratories Network (CO-LaN) and is used by developers and end-users of process simulation software implementing CAPE-OPEN interfaces. COLTT helps in pinpointing issues in the implementation and use of CAPE-OPEN interfaces.