On Friday 26 April, a CODATA delegation met with colleagues from IIASA (International Institute for Applied Systems Analysis). The purpose of the meeting was to establish a dialog between IIASA and CODATA and discuss possible joint collaboration. Among principal results was an agreement to held a workshop at the end of 2019 in IIASA with active participation of IIASA programm directors and leaders of a newly elected CODATA Task Group Advanced mathematical tools for data-driven applied systems analysis. The objective of the Task Group is development of an advanced mathematical toolkit for the wide spectrum of applied systems analysis problems, that we can be expected to face in the near future while building a global digital economy.