Do not specify the delta_time between snapshots when using an output list.

examples/EAGLE_ICs/EAGLE_12/eagle_12.yml

@@ -27,8 +27,6 @@ TimeIntegration:
 # Parameters governing the snapshots
 Snapshots:
   basename:            eagle # Common part of the name of output files
-  scale_factor_first:  0.05
-  delta_time:          1.02
   output_list_on:      1
   output_list:         ./output_list.txt
 

examples/EAGLE_ICs/EAGLE_25/eagle_25.yml

@@ -27,8 +27,6 @@ TimeIntegration:
 # Parameters governing the snapshots
 Snapshots:
   basename:            eagle # Common part of the name of output files
-  scale_factor_first:  0.05
-  delta_time:          1.02
   output_list_on:      1
   output_list:         ./output_list.txt
 

examples/EAGLE_ICs/EAGLE_50/eagle_50.yml

@@ -27,8 +27,6 @@ TimeIntegration:
 # Parameters governing the snapshots
 Snapshots:
   basename:            eagle # Common part of the name of output files
-  scale_factor_first:  0.05
-  delta_time:          1.02
   output_list_on:      1
   output_list:         ./output_list.txt
 

src/engine.c

@@ -4948,7 +4948,7 @@ void engine_init(struct engine *e, struct space *s, struct swift_params *params,
   e->time_first_snapshot =
       parser_get_opt_param_double(params, "Snapshots:time_first", 0.);
   e->delta_time_snapshot =
-      parser_get_param_double(params, "Snapshots:delta_time");
+      parser_get_opt_param_double(params, "Snapshots:delta_time", -1.);
   e->ti_next_snapshot = 0;
   parser_get_param_string(params, "Snapshots:basename", e->snapshot_base_name);
   e->snapshot_compression =