Arm and js_createTwistySegmentUI.mel issue

[CG Pilot]

When using Create Twisty Segment Window in Maya 2015 I keep getting an error. After running the script, the placement of joint position is incorrect and it locates it at 0,0,0. It doesn't add the joints under a group and its adds clusters into the group.

Here is the error

// Error: file: C:/Users/furmans/Documents/maya/2015-x64/scripts/js_createTwistySegment.mel line 124: Two joints or effectors must be selected. //

I have attached a resulting screen capture.