problem with --regendir

hello,
I have 4 magdevices:

/dev/sdf1             459G  407G    5M 100% /opt/conquest_1/mag0
/dev/sdg1             688G  653G   15M 100% /opt/conquest_1/mag1
/dev/sdh1             688G  653G   25M 100% /opt/conquest_1/mag2
/dev/sdd1             917G  505G  367G  58% /opt/conquest_1/mag3

I want to make space for images in jpg and I have to move some of the studies from mag0, mag1, mag2 to mag3.
I would not regenerate the entire database to update the file paths in it, because it will take too long.
First I tried to move a directory with CT studies to mag3 and by using regendir, regenerate mag3/CT2/ directory,
but using "./dgate --regendir:MAG3,mag3/CT2/" or "./dgate --regendir:mag3/CT2/" I could not do this.
What can I do wrong ?
Is there another way to move several studies to another magdevice with update data in database?

ps. sorry for my poor english

ok, solved the problem, I used the wrong path, should be:
./dgate --regendir:MAG3,CT2