But Wait,
I was a little too fast in my conclusion...
The cloneDel command did not actually delete the flexclone volumes, they're still present on my SVM, and visible with a cloneList command:
[root@redhat6-dfm-01 ~]# /opt/scServer4.1.1P2/snapcreator --user admin --profile MaxDB --config maxd_sles13_01_mount --action cloneList --verbose
INFO: --server not specified, default is localhost
INFO: --port not specified, default is 8443
INFO: Missing option --passwd
Enter password:
[Fri Feb 27 10:55:50 2015] INFO: STORAGE-02133: Listing cloned volumes.
[Fri Feb 27 10:55:50 2015] INFO: STORAGE-02134: Listing cloned volumes finished successfully.
########## NetApp Snap Creator Framework 4.1.1P2 Volume Clone (Primary) List for svmax01 ##########
### Clone Name ### ### Parent Snapshot copy ### ### Parent volume ###
cl_maxd_sles13_01_mount_vsaparch01_20150227102235 maxdb_sc_made-hourly_20150226101750 vsaparch01
cl_maxd_sles13_01_mount_vsapdata01_20150227102235 maxdb_sc_made-hourly_20150226101750 vsapdata01
[root@redhat6-dfm-01 ~]#

Can someone clarify what I am doing wrong here? Bug or no Bug?
Thanks
Pierre