You have to use the correct oodle version (dll file) for compressing.
Either copy "oo2core_4_win64.dll" from game folder to "UltraArc folder\Resources\PE\OodleRec" or use the oodle4 dll from the same folder (Oodle4 folder) where all the 3 exe files are.
For unpacking, use COMPRESSOR.ini inside CIUv3 archive and enable OodleRec (delete the //) and use "Oodle4".
Code:
#Define OodleRec "Oodle4"
PS: The "DiskSpan" folder inside _Tools archive is outdated and is removed with the next upcoming version of _Tools.