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You have to first build the executable with the flags "Produce debugging symbols", "Profile code when executed" and optimizations disabled.
Then you have to run the executable and at the end you can go to Plugins->Code Profiler.
This steps should work.

In Italy it doesn't work.

You can use python-chess to generate all legal moves in san format for a lot of fen hoping they coverage the most of cases.

xboard could be an option, I know there is a version for linux of arena but I haven't tried it

If I can ask, how do you compare the 10 depth search eval from Ethereal with its static evaluation? The two evals can differ a lot.

I have solved the allocation problem and now it works also with concurrency. I have changed the development version so the fix will be available with the next release. Thank you for reporting me the problems.

Cutechess cli or the gui? What OS are you using? Linux or Windows? I will have a look

Maybe you have used a lot of threads or maybe you have used a larger trasnposition table and you have changed it without sending and ucinewgame. The transposition table is allocated once the engine receive an ucinewgame. Are you using the tablebase or not? What are the commands that the gui sends to...

In Pedone I have removed razoring because it gives nothing and for this reason the margin is very difficult to tune.
Now I have a simpler code and one margin less to tune.

I have included in the executable the 4men syzygy tables.