Error when trying to load JEOL's .map file

[PereraUmesha]

Describe the bug

I am trying to load a .map file from JEOL's EPMA (Electron Probe Micro Analyzer).
Then I get the below error.

WARNING:hyperspy.io_plugins.jeol:Not a valid JEOL img format
ERROR:hyperspy.io:If this file format is supported, please report this error to the HyperSpy developers.

UnboundLocalError Traceback (most recent call last)
Input In [4], in <cell line: 1>()
----> 1 mdata = hs.load(map_fname)

File ~\anaconda3\envs\new202302\lib\site-packages\hyperspy\io.py:466, in load(filenames, signal_type, stack, stack_axis, new_axis_name, lazy, convert_units, escape_square_brackets, stack_metadata, load_original_metadata, show_progressbar, **kwds)
463 objects.append(signal)
464 else:
465 # No stack, so simply we load all signals in all files separately
--> 466 objects = [load_single_file(filename, lazy=lazy, **kwds)
467 for filename in filenames]
469 if len(objects) == 1:
470 objects = objects[0]

File ~\anaconda3\envs\new202302\lib\site-packages\hyperspy\io.py:466, in (.0)
463 objects.append(signal)
464 else:
465 # No stack, so simply we load all signals in all files separately
--> 466 objects = [load_single_file(filename, lazy=lazy, **kwds)
467 for filename in filenames]
469 if len(objects) == 1:
470 objects = objects[0]

File ~\anaconda3\envs\new202302\lib\site-packages\hyperspy\io.py:525, in load_single_file(filename, **kwds)
518 raise ValueError(
519 "reader should be one of None, str, "
520 "or a custom file reader object"
521 )
523 try:
524 # Try and load the file
--> 525 return load_with_reader(filename=filename, reader=reader, **kwds)
527 except BaseException:
528 _logger.error(
529 "If this file format is supported, please "
530 "report this error to the HyperSpy developers."
531 )

File ~\anaconda3\envs\new202302\lib\site-packages\hyperspy\io.py:545, in load_with_reader(filename, reader, signal_type, convert_units, load_original_metadata, **kwds)
543 """Load a supported file with a given reader."""
544 lazy = kwds.get('lazy', False)
--> 545 file_data_list = reader.file_reader(filename, **kwds)
546 signal_list = []
548 for signal_dict in file_data_list:

File ~\anaconda3\envs\new202302\lib\site-packages\hyperspy\io_plugins\jeol.py:109, in file_reader(filename, **kwds)
107 fd.close()
108 else:
--> 109 d = extension_to_reader_mapping[file_ext](filename, **kwds)
110 if isinstance(d, list):
111 dictionary.extend(d)

File ~\anaconda3\envs\new202302\lib\site-packages\hyperspy\io_plugins\jeol.py:194, in _read_img(filename, scale, **kwargs)
190 _logger.warning("Not a valid JEOL img format")
192 fd.close()
--> 194 return dictionary

UnboundLocalError: local variable 'dictionary' referenced before assignment

To Reproduce

Steps to reproduce the behavior:

import hyperspy.api as hs
from pathlib import Path

map_fname = Path("data/inputdata/data001.map")
mdata = hs.load(map_fname)

Expected behavior

Load the contents of .map file

Python environement:

• HyperSpy version: 1.7.3
• Python version: 3.9.16

Additional context

[ericpre]

It seems that this file is not supported, can you please share a file that we can use to reproduce and test?

[PereraUmesha]

Thank you for the response.
Please find the file (Test.map) inside the following .zip file

Test.zip

[nem1234]

Is the size of image fixed with 256x256 pixels?
Is there another file that was saved with *.img file?

[nem1234]

This test file contains 32 bytes header:
00000000 01 00 00 00 00 00 00 00 00 00 00 00 08 00 00 00 |................|
00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|

And also 256x256 pixels double precision float values (8bytes / pixel).
00000020 00 00 00 00 00 cc b1 40 00 00 00 00 00 c0 b1 40 |.......@.......@|
....

[nem1234]

We need more sample data to resolve this issue.
Do you have some related metadata files with this map?

[ericpre]

@PereraUmesha, would you be able to provide the information asked by @nem1234? Thanks!