关于MATLAB中的死循环

[barqcf1986]

当我在MATLAB的命令窗口中输入命令语句时,突然就出现了死循环
java.lang.IllegalArgumentException: Invalid substring range
at java.text.AttributedString$AttributedStringIterator.<init>(Unknown Source)
at java.text.AttributedString.getIterator(Unknown Source)
at javax.swing.text.Utilities.drawComposedText(Unknown Source)
at javax.swing.text.PlainView.drawElement(Unknown Source)
at javax.swing.text.PlainView.drawLine(Unknown Source)
at com.mathworks.mde.cmdwin.CmdWinSyntaxUI$SyntaxPlainView.drawLine(CmdWinSyntaxUI.java:509)
这是怎么事?有遇到这种情况的教一下是什么原因?