MatlabGUI调用不了simylink的Pulse Generator 求解 （整流电路仿真）

调用不了Pulse Generator 求解情况如图 代码：
m=str2num(get(handles.J2,'String'));
a=m*0.02/360;
set_param('shiyan2/Pulse↵Generator','PhaseDelay',a)

报错：
错误使用 GUI2>K2_Callback (line 97)
Invalid Simulink object name: shiyan2/Pulse?Generator

出错 gui_mainfcn (line 95)
feval(varargin{:});

出错 GUI2 (line 42)
gui_mainfcn(gui_State, varargin{:});

出错
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)GUI2('K2_Callback',hObject,eventdata,guidata(hObject))
Caused by:
错误使用 GUI2>K2_Callback (line 97)
No block called 'Pulse?Generator' could be found.

计算 UIControl Callback 时出错。

https://blog.csdn.net/qq_42945764/article/details/102578264