how to read snapshots in a loop

[teuben]

Environment
Which version of REBOUND are you using and on what operating system?

• REBOUND Version: 4.0.3
• API interface: C
• Operating System (including version): Linux

Goal
I'm trying to read a SA with many snapshots in a loop and convert to another format. So the essence of the code is:

struct reb_simulationarchive *sa=reb_simulationarchive_create_from_file(infile);
for (int64_t j=0; j < sa->nblobs; j++) {
   // You have to reset function pointers after creating a reb_simulation struct with a binary file.
   struct reb_simulation* r = reb_simulation_create_from_simulationarchive(sa, j);
   ...
   reb_simulation_free(r);
}
reb_simulationarchive_free(sa);

but in reb_simulation_create_from_simulationarchive I keep getting a warning I need to reset the function pointers, which I can't do until I have r according to reb_simulation_reset_function_pointers. I suspect I have a wrong usage pattern, but how do I process these snapshots?

[hannorein]

You're doing it right. You might not need to set the function pointers if you only output data and don't run it.

[teuben]

True, i'm only using the data. But is it possible to avoid these warnings? For large numbers of snapshots this gets a little annoying.

[hannorein]

You can use the function reb_simulation_create_from_simulationarchive_with_messages and then ignore the error message.

[hannorein]

See here on how to use it.

(my naming convention is not well enforced here 😢)