vmdkManagement.pl fail to share the disk

[lstar0206]

Dear William,
I using vmdkManagement.pl in share disk to the guest in vcenter 5.1. It works properly.
Recently, I migrate the vm host to vcenter 6.0 and the vmdkManagement.pl fail to share disk to the guest with following error;
Can't call method "key" on an undefined value at /usr/local/sa/vmtools/vmdkManagement.pl line 131

How can I fix this issue.
thank you.

Regards
Ken