"Rapid Rig: Modular" - Procedural Auto Rig 2.4.8 for Maya (maya script)

Hi Dustin so, i got this message earlier on : // Error: file: C:/Users/UserDocuments/maya/2016/scripts/RapidRig_Modular_V2.mel line 25358: Too many arguments.  Expected 2, found 3. while I was trying to rename my Spine joints from Spine_02SHJnt to simply : Spine ( planning to use it with MBuilder later on ), so, at first glance this looks like something related to Aux bones atrtached to the first spine joint in the hierarchy ( it's a belly area, so I attached two aux joints, one on each side of the belly for dynamic simulation later on  ) , and If I try to continue with renaming, more exactly If I select second spine joint and try to rename it I get this error : // Warning: file: C:/Users/User/Documents/maya/2016/scripts/RapidRig_Modular_V2.mel line 25368: Selected object is not the first joint of a spline     - so, this is in a way a mat position for me, I cannot use this function with rename tool, I'll probably be able to rename joints by hand.

You got any idea why is this happening ? 

Many thx, all best

N.