E-learning is a promising research area, as they are expected to increase enrollment and improve the quality of education. Adaptive e-learning systems, traditionally focused on content personalization, are in need to cope with continuous changing requirements and changing environment. Indeed, the specification and the management quality attributes of such systems, supported throughout the whole lifecycle are still missing. In this paper, we present an approach for continuous requirements monitoring that uses a constraint program to evaluate the satisfaction of the requirements in adaptive e-learning systems and identify solutions (valid configurations) when deviations occur at runtime. To this end, the requirements are conceptualized as a dynamic software product line. A new requirements engineering language that supports goal modelling and reasoning techniques based on claims and soft-dependencies, is applied for the specification, from which the constraint program is automatically generated