Processing the same FBneo DAT as this user and it seems DATROMTool always leaves the processed ROMs in sub-directories that do not exist in the source files.
So if the source ROM is like this:
./in-dir/romname.zip
The output of DATROMTool is like this:
./out-dir/romname/romname.zip
I am using your RC2 release tag with OpenJDK 11.0.16 and not specifying --force-subfolder
Processing the same FBneo DAT as this user and it seems DATROMTool always leaves the processed ROMs in sub-directories that do not exist in the source files.
So if the source ROM is like this:
./in-dir/romname.zip
The output of DATROMTool is like this:
./out-dir/romname/romname.zip
I am using your RC2 release tag with OpenJDK 11.0.16 and not specifying --force-subfolder