Fails to open processed Omnic *.map files

[chourroutm]

Hi!
I got a problem to open my FTIR Omnic Map files after processing them (Atmospheric Suppression feature from OMNIC 9.2) with the IO module of PyMCA: I get an error because the searchedChain is not found (it is "Spectrum " as bytes in my case).

subsection not found   File "C:\Program Files\Python36\lib\site-packages\cx_Freeze\initscripts\__startup__.py", line 14, in run
  File "C:\Program Files\Python36\lib\site-packages\cx_Freeze\initscripts\Console.py", line 26, in run
  File "build\tmp\QStackWidget.py", line 1428, in <module>
  File "C:\Program Files\PyMca 5.6.3\PyMca5\PyMcaGui\pymca\StackSelector.py", line 151, in getStack
    stack = OmnicMap.OmnicMap(filelist[0])
  File "C:\Program Files\PyMca 5.6.3\PyMca5\PyMcaIO\OmnicMap.py", line 79, in __init__
    firstByte = data.index(searchedChain)

I will try to identify another chain to use as a landmark. What I plan to do to achieve this is:

1. Read the firstByte from a non-processed map;
2. Set firstByte to this fixed value and try to open a processed map;
3. Read the bytes near it and see if they correspond to a new keyword.

Otherwise, I wonder if it is possible to parse the whole file to detect some letters (e.g. "e") or if I'll get too much information...

[vasole]

Hi, thanks for the report.

Is there a way I can get hold on an example file? It would help me a lot.

[chourroutm]

Sure, there is a sample data (online until June 17th): https://filesender.renater.fr/?s=download&token=ecfc60ed-98e0-4ab8-bbce-8af6637a59d8
Files with "ATM CORR" were processed and cannot be opened in PyMCA; files without "ATM CORR" are the original files that PyMCA can open.

My investigation was unfruitful! Please tell me if I can be of any help.