problem with getting images in Andor sdk 2

[sulton560]

Thank you for this great library. I am facing problems with getting images from my iStar Spectroscope using this library. The problem is when using the _read_frames function I get image with no information in it (I mean laser shot or anything). matrice with the shape of 1024x1024 and with the values from 495 to 530. I gave the shape of this image according to my detector size. But what I want to get is the two dimensional matrice with wavelength and counts in it.
To get a better image i tried to use the other function getAcquiredData() but I get the following error. Can you please guide me how to solve it.

And one more question, Can you please tell me what is the range in _read_frames function? and what is the limit of it. To get a single scan I passed (0,1) to the range. Am I using it correctly?

Traceback (most recent call last):
File "C:\Users\cpl_laptop\AppData\Local\Temp\ipykernel_7832\1184092104.py", line 109, in get_data
my_data = cam.get_acquired_data()
^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\cpl_laptop\anaconda3\Lib\site-packages\pylablib\devices\Andor\AndorSDK2.py", line 1098, in get_acquired_data
result = lib.GetAcquiredData(dim)
^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 1, in
File "C:\Users\cpl_laptop\anaconda3\Lib\site-packages\pylablib\core\utils\ctypes_wrap.py", line 267, in wrapped_func
func_args=self._prepare_arguments(argnames,prep_argtypes,kwargs,argprep)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\cpl_laptop\anaconda3\Lib\site-packages\pylablib\core\utils\ctypes_wrap.py", line 160, in _prepare_arguments
v=functions.call_cut_args(p,**kwargs) if hasattr(p,"call") else p
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\cpl_laptop\anaconda3\Lib\site-packages\pylablib\core\utils\functions.py", line 309, in call_cut_args
return func(*args,**cut_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\cpl_laptop\anaconda3\Lib\site-packages\pylablib\core\utils\ctypes_wrap.py", line 336, in prep
n=args[size_arg_pos]
~~~~^^^^^^^^^^^^^^
IndexError: tuple index out of range