我运行这个软件的VAR时候总是会弹出来以下的error：

Error in GRTE Settings (path)
Contains Invalid Character "~" or " ".
Please Change Graphics_Dir Value

我查了官网，他说：
Why do I get an error when graphics should be displayed?
The most likely reason is that the graphics directory is not writable or contains whitespace characters. By default the jmulti graphics path points to the installation directory. In network installations this is often write protected, therefore the graphics directory must be changed to point to a writable path that contains no whitespace characters. This can be set in jgrte/engine_config.xml in the GRAPHICS_DIR variable.
One may rightfully ask why this annoying behaviour has not been avoided by setting the GRAPHICS_DIR path to the default temporary directory which is always writable. However, that path typically contains whitespace characters which are not handled properly by the GRTE 5.0 on which JMulTi currently depends. It is hoped that an update to GRTE 8.0 will fix this.  

但是他没说怎么设置啊！！！

我的 jgrte/engine_config.xml 文件：
<?xml version="1.0" encoding="UTF-8"?>
<ConfigHolder xmlns="java:com.jstatcom.engine" engine="GRTE">
  <ConfigHolder$KeyValPair key="GAUSSAPI_SYSLIBNAME" value="gaussjavaapirt"/>
  <ConfigHolder$KeyValPair key="GCG_FILENAME" value="jgrte.gcg"/>
  <ConfigHolder$KeyValPair key="DO_JGRTE_INIT" value="true"/>
  <ConfigHolder$KeyValPair key="GRAPHICS_DIR" value=""/>
</ConfigHolder>

有没有高手用这个软件的，能不能把你的 jgrte/engine_config.xml 贴下让我比较下有什么区别~