Can't open lstm.train despite (probably) having all training tools about tesstrain HOT 1 OPEN

1. Please do not try to train Tesseract unless you are not familiar with tesseract.
2. Do not try to train tesseract on the cloud or some external service unless you can train tesseract on alocal machine (e.g. you can replicate the problem and find the solution on a local machine)
3. Make sure you can use/train ocrd-testset.zip without error.
4. The current make training process does not correctly handle errors/missing dependencies (e.g. bc) - you need to always log the whole training process to find the reason (there is intention to rewrite it, but we lack resources (time)). Try to check&delete for zero-length files.

from tesstrain.