1.6.2: batch convert unnecessary rename when using multi-core

[fireattack]

This is a regression; I cannot reproduce the bug in 1.4.5.

I believe the bug started to appear around 1.6.x.

When converting image with the following setting (see also the attachment for the saved preset):

The output file shouldn't need to be renamed to {filename}_01 because the original files are deleted.
However, it will generate outputs with {filename}_01 filenames.

This only happens when I enable "Use multiple CPU Cores".

[xnview]

Thanks to your detailed description I can reproduce the problem.

[xnview]

This problem is supposed to be fixed in XnView MP 1.6.3. Please check and confirm the bug fix here.