I am running gocr-0.44 on W2k with learning.
E:\temp\gocr.exe -m 130 text.pnm
When db folder is empty, it asks for unknown characters and creates files in E:\temp\db folder. But when folder is not empty (the same command with the same file is run again) it returns error:
ERROR C:\ccode\mysource\gocr\gocr-0.44\src\pnm.c L295: no PNM (P1..P6).
The file to recognize and the database folder are included.