"Replace Shape" not working, mgear5, Maya 2025

[jobomat]

If you try to replace a NURBS-Shape via the "mgear > Rigbits > Replace Shape" menu item, you are presented with the following error:

# Error: More than one object matches name: ['whateverNurbsCurveShapeName']
# # Traceback (most recent call last):
# #   File "<maya console>", line 3, in <module>
# #   File "C:\Users\Anwender\Documents\maya\2025\modules\scripts\mgear\rigbits\__init__.py", line 422, in replaceShape
# #     pm.parent(source2.getShapes(), target, r=True, s=True)
# #   File "C:\Users\Anwender\Documents\maya\2025\modules\scripts\mgear\pymaya\cmd.py", line 231, in wrapper
# #     res = func(*args, **kwargs)
# # ValueError: More than one object matches name: ['whateverNurbsCurveShapeName']

I tried various renamings of the Shape-Node and the Transform. I also tried to fix it in the code, but ran out of time.

I think the issue is, that pymaya.getShapes internally calls pymaya.cmd.listRelatives which itself seems to just wrap maya.cmds.listRelatives. Therefore only a list of strings is returned which contains the short names of the shape nodes. And these are not unique. I suspect if pymaya.cmd.listRelatives would not just wrap cmds.listRelatives the issue could easily be fixed.

[jobomat]

Fixed by acting on names and not pymaya-objects. Replace the function replaceShape in mgear/rigbits/__init__.py with this one:

def replaceShape(source=None, targets=None, *args):
    """Replace the shape of one object by another.

    Args:
        source (None, PyNode): Source object with the original shape.
        targets (None, list of pyNode): Targets object to apply the
            source shape.
        *args: Maya's dummy

    Returns:

        None: Return non if nothing is selected or the source and targets
        are none

    """
    if not source and not targets:
        oSel = pm.selected()
        if len(oSel) < 2:
            pm.displayWarning("At less 2 objects must be selected")
            return None
        else:
            source = oSel[0]
            targets = oSel[1:]

    for target in targets:
        print(target)
        source2 = pm.duplicate(source)[0]
        print(type(source2))
        shape = target.getShapes()
        cnx = []
        if shape:
            cnx = shape[0].listConnections(plugs=True, c=True)
            cnx = [[c[1], c[0].shortName()] for c in cnx]
            # Disconnect the conexion before delete the old shape
            for s in shape:
                for c in s.listConnections(plugs=True, c=True):
                    pm.disconnectAttr(c[0])
                pm.delete(s.longName())
        
        # getShapes is returning strings only... therefore using this slightly ugly fix:
        # adding the kwarg "fullPath"=True to fix the "not unique" problem
        # and parenting by name
        shape_names = [s for s in source2.getShapes(fullPath=True)]
        for s in shape_names:
            pm.parent(s, target, r=True, s=True)
        
        # fix here is the same as above...
        for i, sh in enumerate(target.getShapes(fullPath=True)):
            # Restore shapes connections
            for c in cnx:
                pm.connectAttr(c[0], f"{sh}.{c[1]}")
            pm.rename(sh, target.name() + "_%s_Shape" % str(i))

        pm.delete(source2)