Description
Current Behavior
During MICR font training for check validation, the combine_tessdata.exe step fails with the following error:
Failed to create a temporary file micr.traineddata.tmp
Here’s the relevant log snippet from my script:
2025-03-05 19:52:23,933 - ERROR - combine_tessdata failed: Failed to create a temporary file micr.traineddata.tmp
2025-03-05 19:52:23,935 - ERROR - MICR font training failed: Command '['C:\Program Files\Tesseract-OCR\combine_tessdata.exe', '-o', 'micr.traineddata', 'training.unicharset', 'training.inttemp', 'training.pffmtable', 'training.shapetable', 'training.normproto']' returned non-zero exit status 1.
2025-03-05 19:52:23,937 - ERROR - Processing failed: Training failed: Command '['C:\Program Files\Tesseract-OCR\combine_tessdata.exe', '-o', 'micr.traineddata', 'training.unicharset', 'training.inttemp', 'training.pffmtable', 'training.shapetable', 'training.normproto']' returned non-zero exit status 1.
The training process halts at this step, and the micr.traineddata file is not generated.
The script sets the TMP and TEMP environment variables to the training directory before running combine_tessdata.exe, but the error persists.
Manual execution of the combine_tessdata command in the training directory also fails with the same error:
C:\Users\jotam\projects\ocr-trans\check_validation\training_model\training>"C:\Program Files\Tesseract-OCR\combine_tessdata.exe" -o micr.traineddata training.unicharset training.inttemp training.pffmtable training.shapetable training.normproto
Failed to create a temporary file micr.traineddata.tmp
the full log from my script on GitHub:
https://github.com/jo-walker/ocr-reader/blob/main/check_validation/check_processing.log#L1314
Expected Behavior
The training should complete successfully, generating the micr.traineddata file in the specified training directory.
Suggested Fix
No response
tesseract -v
tesseract v5.5.0.20241111
leptonica-1.85.0
libgif 5.2.2 : libjpeg 8d (libjpeg-turbo 3.0.4) : libpng 1.6.44 : libtiff 4.7.0 : zlib 1.3.1 : libwebp 1.4.0 : libopenjp2 2.5.2
Found AVX2
Found AVX
Found FMA
Found SSE4.1
Found libarchive 3.7.7 zlib/1.3.1 liblzma/5.6.3 bz2lib/1.0.8 liblz4/1.10.0 libzstd/1.5.6
Found libcurl/8.11.0 Schannel zlib/1.3.1 brotli/1.1.0 zstd/1.5.6 libidn2/2.3.7 libpsl/0.21.5 libssh2/1.11.0
Operating System
Windows 11
Other Operating System
No response
uname -a
No response
Compiler
No response
CPU
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Virtualization / Containers
No response
Other Information
No response