Dseries problem

I have developed a dseries object, which contains a date variable and my observed variables and which is stored in a sperate .mat-file. How can I use it for estimation?
data(datafile=estimationdata,series=ts_dsge, first_obs=1969Q1, last_obs=2015Q4); does not work.

See tests/dates/fs2000.mod · master · Dynare / dynare · GitLab for an example