When I run readpst -M -b file.pst it extracts less mail, and a slightly different amount each time, than when it's run with the -j 0 option. An older libpst 0.71 extracts all mail in parallel without -j 0 so maybe there's some concurrency bug that got introduced since then? I can send you pst files if you have trouble reproducing, but for me this happens on basically every .pst file.
When I run
readpst -M -b file.pstit extracts less mail, and a slightly different amount each time, than when it's run with the -j 0 option. An older libpst 0.71 extracts all mail in parallel without -j 0 so maybe there's some concurrency bug that got introduced since then? I can send you pst files if you have trouble reproducing, but for me this happens on basically every .pst file.