XP SAS9.1.3输出正常。

不会吧，你的意思是windows XP能正常输出来，我的电脑装的是win7 64位系统，难道是系统的原因。。。

You need to specify the gout which tells SAS where  graphs go. Here is an example.

goption device=jpeg;
libname s 'c:\temp\';
proc gplot data=sashelp.class gout=s.myjpeg;
plot height*weight/ name='testp1';
run;
quit;

Very 3Q ，This  problem has been solved by your method!