hi
i m explaining my problem here.please help me.
if i open a form again and again after some time it give me an
error.plz help me how to solve this error
thanks
============================================
************ Exception Text **************
System.NullReferenceException: Object reference not set to an
instance of an object.
at System.Windows.Forms.ChildWindow.Callback(IntPtr hWnd, Int32
msg, IntPtr wparam, IntPtr lparam)
************** Loaded Assemblies **************
mscorlib
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.0
CodeBase:
file:///c:/windows/microsoft.net/framework/v1.0.3705/mscorlib.dll
----------------------------------------
ACCOUNT_PLUS_DGS
Assembly Version: 1.0.2141.15932
Win32 Version: 1.0.2141.15932
CodeBase: file:///F:/ACCOUNT_PLUS_DGS_in_dot-
NET/bin/Debug/ACCOUNT_PLUS_DGS.exe
----------------------------------------
System.Windows.Forms
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.0
CodeBase:
file:///c:/windows/assembly/gac/system.windows.forms/1.0.3300.0__b77a
5c561934e089/system.windows.forms.dll
----------------------------------------
System
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.0
CodeBase:
file:///c:/windows/assembly/gac/system/1.0.3300.0__b77a5c561934e089/s
ystem.dll
----------------------------------------
System.Drawing
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.0
CodeBase:
file:///c:/windows/assembly/gac/system.drawing/1.0.3300.0__b03f5f7f11
d50a3a/system.drawing.dll
----------------------------------------
RAVI_LABLES
Assembly Version: 1.0.1887.40374
Win32 Version: 1.0.1887.40374
CodeBase: file:///F:/ACCOUNT_PLUS_DGS_in_dot-
NET/bin/Debug/RAVI_LABLES.DLL
----------------------------------------
System.Xml
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.0
CodeBase:
file:///c:/windows/assembly/gac/system.xml/1.0.3300.0__b77a5c561934e0
89/system.xml.dll
----------------------------------------
System.Data
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.0
CodeBase:
file:///c:/windows/assembly/gac/system.data/1.0.3300.0__b77a5c561934e
089/system.data.dll
----------------------------------------
LIST_BOX_TYPED
Assembly Version: 1.0.2029.22917
Win32 Version: 1.0.2029.22917
CodeBase: file:///F:/ACCOUNT_PLUS_DGS_in_dot-
NET/bin/Debug/LIST_BOX_TYPED.DLL
----------------------------------------
System.EnterpriseServices
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.0
CodeBase:
file:///c:/windows/assembly/gac/system.enterpriseservices/1.0.3300.0_
_b03f5f7f11d50a3a/system.enterpriseservices.dll
----------------------------------------
RAVI_COLOUR_TEXT_BOX
Assembly Version: 1.0.1946.26738
Win32 Version: 1.0.1946.26738
CodeBase: file:///F:/ACCOUNT_PLUS_DGS_in_dot-
NET/bin/Debug/RAVI_COLOUR_TEXT_BOX.DLL
----------------------------------------
RK_COMBO_BOX
Assembly Version: 1.0.1914.35687
Win32 Version: 1.0.1914.35687
CodeBase: file:///F:/ACCOUNT_PLUS_DGS_in_dot-
NET/bin/Debug/RK_COMBO_BOX.DLL
----------------------------------------
RAVI_NUMERIC_CONTROL
Assembly Version: 1.0.2140.34601
Win32 Version: 1.0.2140.34601
CodeBase: file:///F:/ACCOUNT_PLUS_DGS_in_dot-
NET/bin/Debug/RAVI_NUMERIC_CONTROL.DLL
----------------------------------------
Microsoft.VisualBasic
Assembly Version: 7.0.3300.0
Win32 Version: 7.00.9466
CodeBase:
file:///c:/windows/assembly/gac/microsoft.visualbasic/7.0.3300.0__b03
f5f7f11d50a3a/microsoft.visualbasic.dll
----------------------------------------
C1.Win.C1FlexGrid.Classic
Assembly Version: 2.1.20031.104
Win32 Version: 2.1.20032.125
CodeBase: file:///F:/ACCOUNT_PLUS_DGS_in_dot-
NET/bin/Debug/C1.Win.C1FlexGrid.Classic.DLL
----------------------------------------
C1.Win.C1FlexGrid
Assembly Version: 2.1.20031.104
Win32 Version: 2.1.20032.125
CodeBase: file:///F:/ACCOUNT_PLUS_DGS_in_dot-
NET/bin/Debug/C1.Win.C1FlexGrid.DLL
----------------------------------------
C1.Common
Assembly Version: 1.0.20031.116
Win32 Version: 1.0.20031.117
CodeBase: file:///F:/ACCOUNT_PLUS_DGS_in_dot-
NET/bin/Debug/C1.Common.DLL
----------------------------------------
CrystalDecisions.CrystalReports.Engine
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.crystalreports.engin
e/10.0.3300.0__692fbea5521e1304/crystaldecisions.crystalreports.engin
e.dll
----------------------------------------
CrystalDecisions.Shared
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.shared/10.0.3300.0__
692fbea5521e1304/crystaldecisions.shared.dll
----------------------------------------
CrystalDecisions.Windows.Forms
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.windows.forms/10.0.3
300.0__692fbea5521e1304/crystaldecisions.windows.forms.dll
----------------------------------------
CrystalDecisions.ReportSource
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.reportsource/10.0.33
00.0__692fbea5521e1304/crystaldecisions.reportsource.dll
----------------------------------------
System.Web
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.0
CodeBase:
file:///c:/windows/assembly/gac/system.web/1.0.3300.0__b03f5f7f11d50a
3a/system.web.dll
----------------------------------------
CrystalDecisions.ReportAppServer.CommLayer
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.reportappserver.comm
layer/10.0.3300.0__692fbea5521e1304/crystaldecisions.reportappserver.
commlayer.dll
----------------------------------------
CrystalDecisions.ReportAppServer.ClientDoc
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.reportappserver.clie
ntdoc/10.0.3300.0__692fbea5521e1304/crystaldecisions.reportappserver.
clientdoc.dll
----------------------------------------
CrystalDecisions.ReportAppServer.DataSetConversion
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.reportappserver.data
setconversion/10.0.3300.0__692fbea5521e1304/crystaldecisions.reportap
pserver.datasetconversion.dll
----------------------------------------
CrystalDecisions.ReportAppServer.CubeDefModel
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.reportappserver.cube
defmodel/10.0.3300.0__692fbea5521e1304/crystaldecisions.reportappserv
er.cubedefmodel.dll
----------------------------------------
CrystalDecisions.ReportAppServer.Controllers
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.reportappserver.cont
rollers/10.0.3300.0__692fbea5521e1304/crystaldecisions.reportappserve
r.controllers.dll
----------------------------------------
CrystalDecisions.ReportAppServer.DataDefModel
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.reportappserver.data
defmodel/10.0.3300.0__692fbea5521e1304/crystaldecisions.reportappserv
er.datadefmodel.dll
----------------------------------------
CrystalDecisions.ReportAppServer.ReportDefModel
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.reportappserver.repo
rtdefmodel/10.0.3300.0__692fbea5521e1304/crystaldecisions.reportappse
rver.reportdefmodel.dll
----------------------------------------
CrystalDecisions.KeyCode
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.keycode/10.0.3300.0_
_692fbea5521e1304/crystaldecisions.keycode.dll
----------------------------------------
CustomMarshalers
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.0
CodeBase:
file:///c:/windows/assembly/gac/custommarshalers/1.0.3300.0__b03f5f7f
11d50a3a/custommarshalers.dll
----------------------------------------
CrystalDecisions.ReportAppServer.XmlSerialize
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.9500.0
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.reportappserver.xmls
erialize/10.0.3300.0__692fbea5521e1304/crystaldecisions.reportappserv
er.xmlserialize.dll
----------------------------------------
System.Web.Services
Assembly Version: 1.0.3300.0
Win32 Version: 1.0.3705.0
CodeBase:
file:///c:/windows/assembly/gac/system.web.services/1.0.3300.0__b03f5
f7f11d50a3a/system.web.services.dll
----------------------------------------
CrystalDecisions.Enterprise.Framework
Assembly Version: 10.0.3300.0
Win32 Version: 10.0.0.388
CodeBase:
file:///c:/windows/assembly/gac/crystaldecisions.enterprise.framework
/10.0.3300.0__692fbea5521e1304/crystaldecisions.enterprise.framework.
dll
----------------------------------------
************** JIT Debugging **************
To enable just in time (JIT) debugging, the config file for this
application or machine (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.
For example:
<configuration>
<system.windows.forms jitDebugging="true" />
</configuration>
When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the machine
rather than being handled by this dialog.
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