I just downloade the 3.0 beta and ran across the same issue.
Loader shifter UI, added leg_2jnt_01 and built selection.
Stack trace from Maya script editor here:
GEAR version : 3.0.0
= SHIFTER RIG SYSTEM ==============================================
= GUIDE VALIDATION ==============================================
Checking guide
Get options
Get controllers
Get components
leg_C0 (leg_2jnt_01)
Find recursive in [ 0:00:00.043000 ]
Get parenting for: leg_C0
Guide loaded from hierarchy in [ 0:00:00.046000 ]
= BUILDING RIG ==============================================
Initial Hierarchy
Init : leg_C0 (leg_2jnt_01)
Objects : leg_C0 (leg_2jnt_01)
Properties : leg_C0 (leg_2jnt_01)
Operators : leg_C0 (leg_2jnt_01)
Error: setAttr: The attribute ‘leg_C0_tws2_loc.scaleX’ is locked or connected and cannot be modified.
Traceback (most recent call last):
File “C:\Program Files\Autodesk\Maya2018\Python\lib\site-packages\pymel\internal\factories.py”, line 785, in callback
res = origCallback(*newargs)
File “C:\Setups\GameLoft\maya\modules\mgear_3.0.0_beta_01\scripts\mgear\shifter\gui.py”, line 167, in buildFromSelection
rg.buildFromSelection()
File “C:\Setups\GameLoft\maya\modules\mgear_3.0.0_beta_01\scripts\mgear\shifter_init_.py”, line 137, in buildFromSelection
self.build()
File “C:\Setups\GameLoft\maya\modules\mgear_3.0.0_beta_01\scripts\mgear\shifter_init_.py”, line 163, in build
self.processComponents()
File “C:\Setups\GameLoft\maya\modules\mgear_3.0.0_beta_01\scripts\mgear\shifter_init_.py”, line 327, in processComponents
comp.stepMethodsi
File “C:\Setups\GameLoft\maya\modules\mgear_3.0.0_beta_01\scripts\mgear\shifter\component_init_.py”, line 138, in step_02
self.addOperators()
File “C:/Setups/GameLoft/maya/modules/mgear_3.0.0_beta_01/scripts/mgear/shifter_classic_components\leg_2jnt_01_init_.py”, line 598, in addOperators
self.tws2_loc.setAttr(“sx”, .001)
File “C:\Program Files\Autodesk\Maya2018\Python\lib\site-packages\pymel\core\nodetypes.py”, line 567, in setAttr
return general.setAttr("%s.%s" % (self, attr), *args, **kwargs)
File “C:\Program Files\Autodesk\Maya2018\Python\lib\site-packages\pymel\core\general.py”, line 573, in setAttr
cmds.setAttr(attr, *args, **kwargs)
File “C:\Program Files\Autodesk\Maya2018\Python\lib\site-packages\pymel\internal\pmcmds.py”, line 134, in setAttr_wrapped
res = new_cmd(*new_args, **new_kwargs)
RuntimeError: setAttr: The attribute ‘leg_C0_tws2_loc.scaleX’ is locked or connected and cannot be modified.
Cheers,
Dave