This is also in the current release (MITK 2021.10). When naming the Segmentation (default in this case), with some spaces and subfolder name, the file is not stored, but no error is shown (in the UI).
I think we had this bug in a previous version, and it was fixed. But it must be a really old version, I tried the one before (a snapshot from April) and it was also not working.
Log output:
working:
[21.653] Writing image: /data/batch/1.3.12.2.1107.5.1.4.73104.30000020081307523376400012735/application-mitk-flow/jk.dcm
210 of 210 slices mapped to source DICOM images
Found 2 label(s)
Skipping label 0
Processing label 1
Total non-empty slices that will be encoded in SEG for label 1 is 210
(inclusive from 0 to 210)
not working:
[23.377] Writing image: /data/batch/1.3.12.2.1107.5.1.4.73104.30000020081307523376400012735/application-mitk-flow/Private^000001_BPL_Abdomen_Winfried (Adult) / Abdomen BPL 5.0 B40f-labels.dcm
210 of 210 slices mapped to source DICOM images
Found 2 label(s)
Skipping label 0
Processing label 1
Total non-empty slices that will be encoded in SEG for label 1 is 210
(inclusive from 0 to 210)
The UI always shows success.