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For the problem I'm considering, the number of qubits of the quantum system is 10. And I want to measure, using derandomized measurement, all the 1-local and 2-local observables consist of Pauli Z and X operators, which are stored in the file named my_observables.txt. After compiling the *.cpp files, I run the command data_acquisition_shadow -d [measurements per observable] my_observables.txt 1> scheme.txt. This only works properly for [measurements per observable] smaller than 100000. When the the number of measurements per observable is set to 100000 or larger, the programm just keeps running and won't stop.

I'm not sure whether this issue is due to the bug in the implementation of the data_acquisition_shadow.cpp file or the defect of the derandomization algorithm itself.

Sorry for interrupt after your wonderful work published 4 yrs ago. I'm an undergraduate student major in physics, and when I was trying to repeat this work, the "readme.md" shell line "> ./data_acquisition_shadow -d 100 generated_observables.txt 1> scheme.txt" was ended with a fatal error
Assertion failed: (pauli_observable[0] == 'X' || pauli_observable[0] == 'Y' || pauli_observable[0] == 'Z'), function read_all_observables, file data_acquisition_shadow.cpp, line 86.
[1] 9491 abort ./data_acquisition_shadow -d 100 generated_observables.txt

And, when running "./data_acquisition_shadow -d 1 observables.txt", the program print:
X Y X Y Y X Y X Y X
[Status 1: 7]
X X Y X Y Y X Y X Y
[Status 2: 13]
X X X X X Y X X Y X
[Status 3: 16]
X X X X X X X X X X
[Status 4: 17]

instead of

X Y X Y Y X Y X Y X
[Status 1: 0]
X X Y X Y Y X Y X Y
[Status 2: 0]
X X X X X Y X X Y X
[Status 3: 0]
X X X X X X X X X X
[Status 4: 1]

I would be grateful if you could help me to solve this question. Much appreciated.