numberformatException when i convert from string to decimal

[AnandhaMurugan]

I got a numberformatException when i convert from string to decimal how to resolve it

java.lang.NumberFormatException
    at java.math.BigDecimal.<init>(BigDecimal.java:455)
    at java.math.BigDecimal.<init>(BigDecimal.java:724)
    at org.openbravo.erpCommon.ad_reports.Hierarchical_trial_balance_report.printPagePDF(Hierarchical_trial_balance_report.java:550)
    at org.openbravo.erpCommon.ad_reports.Hierarchical_trial_balance_report.doPost(Hierarchical_trial_balance_report.java:164)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    at org.openbravo.base.HttpBaseServlet.serviceInitialized(HttpBaseServlet.java:224)
    at org.openbravo.base.secureApp.HttpSecureAppServlet.service(HttpSecureAppServlet.java:330)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.openbravo.utils.SessionExpirationFilter.doFilter(SessionExpirationFilter.java:66)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.openbravo.utils.CharsetFilter.doFilter(CharsetFilter.java:35)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.openbravo.dal.core.DalRequestFilter$1.doAction(DalRequestFilter.java:79)
    at org.openbravo.dal.core.ThreadHandler.run(ThreadHandler.java:46)
    at org.openbravo.dal.core.DalRequestFilter.doFilter(DalRequestFilter.java:85)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
    at java.lang.Thread.run(Thread.java:619)

[Dheeraj Joshi]

We can not make out what's wrong with the code and why this exception is thrown. Please post the code which is causing this exception.

Regards
Dheeraj Joshi