Arithmetic operation resulted in an overflow - asp.net-mvc

Question

The application is working well in Win server 2003 /IIS 6.0 environment.
When I move the code to win server 2008/IIS 7.0 , I am getting below error? Could you advise what is the error cause? Did i missed anything?
Server Error in '/' Application.
Arithmetic operation resulted in an overflow.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.OverflowException: Arithmetic operation resulted in an overflow.
Stack Trace:
[OverflowException: Arithmetic operation resulted in an overflow.]
System.IntPtr.ToInt32() +37
CoreLab.Common.a.a(Delegate A_0) +1935
CoreLab.Oracle.ab.a(OracleConnection A_0) +214
CoreLab.Oracle.OracleConnection.Open() +375
MonsterWorldwide.iTime.DataAccess.TimecardDA.GetTimecardPageInfoSet(Int32 personId, Int32 pageNumber, Int32 rowsPerPage, Int32& rowsCountTotal) in c:\inetpub\wwwroot\mtitimeproduction\dataaccess\timecardda.cs:28
MonsterWorldwide.iTime.BusinessLogic.TimecardBL.GetTimecardPageInfoSet(Int32 personId, Int32 pageNumber, Int32 rowsPerPage, Int32& rowsCountTotal) in c:\inetpub\wwwroot\mtitimeproduction\businesslogic\timecardbl.cs:24
MonsterWorldwide.iTime.WebGUI.WebParts.TimecardList.LoadData() in c:\inetpub\wwwroot\mtitimeproduction\webgui\webparts\timecardlist.ascx.cs:112
MonsterWorldwide.iTime.WebGUI.WebParts.TimecardList.Page_Load(Object sender, EventArgs e) in c:\inetpub\wwwroot\mtitimeproduction\webgui\webparts\timecardlist.ascx.cs:52
System.Web.UI.Control.OnLoad(EventArgs e) +132
System.Web.UI.Control.LoadRecursive() +66
System.Web.UI.Control.LoadRecursive() +191
System.Web.UI.Control.LoadRecursive() +191
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2428
Version Information: Microsoft .NET Framework Version:2.0.50727.4952; ASP.NET Version:2.0.50727.4927

Answer 1

[OverflowException: Arithmetic operation resulted in an overflow.]
System.IntPtr.ToInt32() +37
CoreLab.Common.a.a(Delegate A_0) +1935
CoreLab.Oracle.ab.a(OracleConnection A_0) +214
This looks like some poorly written unmanaged interop code which doesn't take into account the CPU type and which blows when run in a x64 bit OS. In a 64-bit OS pointers are 64-bit integers contrary to 32 bit OS.
Maybe you should check the documentation of this CoreLab.Common component you are using whether it supports 64-bit systems.
Quote from the documentation of the IntPtr.ToInt32 method:
OverflowException: On a 64-bit platform, the value of this instance is too large or too small to represent as a 32-bit signed integer.