Please help me. How to solve this.
System.NullReferenceException: Object reference not set to an instance of an object.
at Dynamics.Ax.Application.CustInvoiceCalcTax.Post(LedgerPostingController _ledgerPostingController, NoYes post, Boolean ) in CustInvoiceCalcTax.post.xpp:line 29
at Dynamics.Ax.Application.CustInvoiceCalcTax.Post(LedgerPostingController _ledgerPostingController, NoYes post)
at Dynamics.Ax.Application.CustInvoiceCalcTax_Invoice.Post(LedgerPostingController _ledgerPostingController, NoYes post, Boolean ) in CustInvoiceCalcTax_Invoice.post.xpp:line 3
at Dynamics.Ax.Application.CustInvoiceCalcTax_Invoice.Post(LedgerPostingController _ledgerPostingController, NoYes post)
at Dynamics.Ax.Application.CustPostInvoice.Runinternal() in CustPostInvoice.runInternal.xpp:line 683
at Dynamics.Ax.Application.CustPostInvoice.staticRun(Object[] _params) in CustPostInvoice.staticRun.xpp:line 45
at CustPostInvoice::staticRun(Object[] )
at Microsoft.Dynamics.Ax.Xpp.ReflectionCallHelper.MakeStaticCall(Type type, String MethodName, Object[] parameters)
at Dynamics.Ax.Application.SysDictClass.invokeStaticMethod(Object[] _params) in SysDictClass.invokeStaticMethod.xpp:line 26
at SysDictClass::invokeStaticMethod(Object[] )
at Microsoft.Dynamics.Ax.Xpp.ReflectionCallHelper.MakeStaticCall(Type type, String MethodName, Object[] parameters)
at Microsoft.Dynamics.Ax.Xpp.PredefinedFunctions.runAsInvoke(String className, String staticMethodName, Object[] parms, Object[]& exportInfolog)
