I found the answer in from the Dymola support. See the Dymola user manual V1 p 501 on the simulator API :
experimentSetupOutput(...)
input Boolean textual := false "Textual storage";
input Boolean doublePrecision := false "Double precision";
input Boolean states := true "Store state variables";
input Boolean derivatives := true "Store derivative variables";
input Boolean inputs := true "Store input variables";
input Boolean outputs := true "Store outputs variables";
input Boolean auxiliaries := true "Store auxiliary variables";
input Boolean equdistant := true "Store equidistantly";
input Boolean events := true "Store variables at events";
input Boolean debug := false "Write log messages";
output Boolean ok;
Therefore the flags to set before the simulateModel command were :
experimentSetupOutput(events=false,equdistant=true);