Due to unforeseen circumstances, the 940 dance company’s New Works Concert scheduled for 7:30 p.m. today has been canceled. Artistic Director Susan Warden apologized for the inconvenience and said that any tickets already purchased for tonight’s performance could be exchanged for the 7:30 p.m. Saturday show. The concert, the culminating event in the company’s season, will be at the Lawrence Arts Center, 940 N.H.