Some of the people working on a movie to be filmed west of Calgary next month are not getting paid.

The movie, The Race to Save Nome, will star Hilary Swank and Kurt Russell.

Filming is slated to start in mid-January on the Morley reserve.

The issues around paying those working on the film started early last month.

The Directors Guild of Canada then sent a letter to its members saying it is trying to find out why workers haven't been paid and advising them to not report for work until they are compensated.

The International Alliance of Theatrical Stage Employees, or IATSE, also sent a letter to members stating it is deeply concerned about issues with cash flow and payroll on this project.

The union has asked the movie producers to put up a $150,000 cash bond.

Calls to the production office in Los Angeles and Calgary were not returned.

The Race to Save Nome is the true story of the effort to take vaccines to Nome, Alaska during a diphtheria outbreak in 1925.