我输入:int(func,x,0,1)后出现错误如下:请问是func这个函数不合格吗?还是?

Error in ==> E:\software\toolbox\symbolic\maplemex.dll
Error in ==> E:\software\toolbox\symbolic\maple.m
On line 116 ==> [result,status] = maplemex(statement);

Error in ==> E:\software\toolbox\symbolic\@sym\maple.m
On line 74 ==> [result,status] = maple(statement);

Error in ==> E:\software\toolbox\symbolic\@sym\int.m
On line 51 ==> r = maple('map','int',f,[x.s '=' a.s '..' b.s]);

Error in ==> E:\software\work\m_index.m (pushbutton1_Callback)
On line 1103 ==> func1 = int(func,x,0,1); % 这里就是我程序中的语句

Error in ==> E:\software\toolbox\matlab\uitools\gui_mainfcn.m
On line 66 ==> feval(varargin{:});

Error in ==> E:\software\work\m_index.m
On line 42 ==> gui_mainfcn(gui_State, varargin{:});

??? Error while evaluating uicontrol Callback.