Abstract. The Aimms package integrates externally supplied solution algorithms for mathematical programming and constraint programming with model development, application integration, and application deployment. In this context, some aspects of the technical realization of the extension of the AIMMS package with a CP interface will be discussed: – Element variables are an abstraction of integer variables permitting a natural extension of the subscripting capabilities in algebraic languages. – The Aimms Open Solver Interface to integrate solution algorithms is extended to communicate instruction arrays in order to communicate non-linear expressions to the CP solvers. In addition, the topics of this workshop will be addressed. 1