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Hi! My parameter file's image output is tiff and I use 2D images. Note that I can use elastix with the same code flawlessly via bash. Could you help me with this issue? Although I defined and checked each directory for elastix, parameter files and output, I keep getting the following error:

/home/usr/elastix-5.0.1-linux/bin/elastix -f /home/usr/fbrain.png -m /home/usr/mbrain.png -p /home/usr/Parameters_Affine.txt -out /home/usr/results
Traceback (most recent call last):
File "example.py", line 36, in
el.register(fixed_image=fixed_image_path,
File "/home/usr/.local/lib/python3.8/site-packages/elastix/elastix_interface.py", line 131, in register
self._execute(cmd, verbose)
File "/home/usr/.local/lib/python3.8/site-packages/elastix/elastix_interface.py", line 102, in _execute
raise ElastixError(proc.returncode, ' '.join(command))
elastix.elastix_interface.ElastixError: Elastix crashed with code 127 for command '/home/usr/elastix-5.0.1-linux/bin/elastix -f /home/usr/fbrain.png -m /home/usr/mbrain.png -p /home/usr/Parameters_Affine.txt -out /home/usr/results'