"it.history.get" gives garbage values. Why?

Code : FLAC3D 9.00.172

In Flac, “hist list series 10” gives correct values :
8.520000e+03 -1.138999e+00
8.530000e+03 -1.063213e+00
8.540000e+03 -9.080559e-01
8.550000e+03 -7.738792e-01
8.560000e+03 -6.592338e-01

But, it python, gives garvage values until 851, then gives correct values
data = it.history.get(‘11’, ‘10’)
print(“Shape of data from history.get(‘11’, ‘10’):”, np.shape(data))
print(“First few rows of data:”, data[:5])

First few rows of data: [[-4.17202458e-309 0.00000000e+000]
[-4.17202458e-309 0.00000000e+000]
[-4.17202458e-309 0.00000000e+000]
[-4.17202458e-309 0.00000000e+000]
[-4.17202458e-309 0.00000000e+000]]

Hi,
Can you send me the save file?
Huy