org.apache.jasper.compiler.ParseException: E:\e-data\tomcat40\bin\..\webapps\examples\jsp\QuadraticBean.jsp(2,81) Attribute a has no value

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org.apache.jasper.compiler.ParseException: E:\e-data\tomcat40\bin\..\webapps\examples\jsp\QuadraticBean.jsp(2,81) Attribute a has no value
at org.apache.jasper.compiler.JspReader.parseAttributeValue(JspReader.java:567)
at org.apache.jasper.compiler.JspReader.parseTagAttributes(JspReader.java:685)
at org.apache.jasper.compiler.Parser$SetProperty.accept(Parser.java:750)
at org.apache.jasper.compiler.Parser.parse(Parser.java:1126)
at org.apache.jasper.compiler.Parser.parse(Parser.java:1091)
at org.apache.jasper.compiler.Parser.parse(Parser.java:1087)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:220)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:207)
at org.apache.jasper.servlet.JspServlet.loadJSP(JspServlet.java:523)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.loadIfNecessary(JspServlet.java:175)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:187)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:379)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:254)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:194)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:255)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:225)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2252)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:446)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:163)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:875)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:952)
at java.lang.Thread.run(Thread.java:484)

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