I found a few posts on problems with splitting a partition, but none seems to describe my particular problem. DD 10.0.0.2160, being run from CD, Full version in Manual mode. Computer has 3 physical PATA drives: 1: 80GB split into C: and D: 2: 80GB E: 3: 400GB F: (less than half full) All partitions are NTFS (PC is running XP). My objective was to split drive 3 into two partitions, ultimately creating a new small drive G:. I tried several times to split partition F:, both with and without moving a couple of files, and with different (legitimate) free space allocations. Each time the same thing happens. The program steps me through the expected dialogs, gets to (what I think is) the last dialog window, I click OK, and nothing has happened! There are no pending tasks to view, the Commit button is non-operational, and the GUI has not changed in any way. I have so far had no other problems with DD (other than a separately posted performance issue), and it seems to be recognizing everything correctly on the 3 drives. It just ignores my attempts to split that partition. I realize that there is a simple workaround that I've in fact just finished performing, and that worked without problem. I resized the partition down, then created a new partition in the newly freed-up space. A "manual split" if you will. But reason for posting is to try to find out for future reference if there is a problem with the Split operation.