Solved

asp.net 32 bit 64 bit question

Posted on 2014-04-23
13
418 Views
Last Modified: 2014-04-24
I am running what is supposed to be a 64 bit .net web application. When I run this command:

aspnet_regiis.exe –i

I get this response:

The error indicates that IIS is in 64 bit mode, while this application is a 32 bit application and thus not compatible.

Any Ideas on how to fix the problem or determine if the application is really 64 or 32 bit?
0
Comment
Question by:jimmylew52
  • 8
  • 5
13 Comments
 
LVL 74

Expert Comment

by:käµfm³d 👽
ID: 40018075
Keep in mind that what is deployed on your server isn't actually machine code--it's IL code. IL code gets compiled on-the-fly to the host machine's architecture. Now, if you are running a 64-bit machine, but you need to run as 32-bit--usually for libraries that were coded as 32-bit (like Oracle libraries)--then you can tell .NET to prefer to run the library as 32-bit code rather than 64-bit. You do this by specifying a configuration of x86 (or x64, depending) in your project's properties.

e.g.

Screenshot
0
 
LVL 1

Author Comment

by:jimmylew52
ID: 40018106
How would I tell if the libraries on the server were compiled for 32 bot or 64 bit? Is there any way to tell?
0
 
LVL 74

Expert Comment

by:käµfm³d 👽
ID: 40018370
They're not compiled to either--they're compiled to IL code. If you want to see what architecture the executable (should) will be compiled to, you can use the CorFlags utility that comes with the .NET Framework. Pass the utility the path to the assembly with no other aruments:

e.g.

C:\>corflags.exe C:\path\to\assembly.dll
C:\>corflags.exe C:\path\to\assembly.exe

Open in new window


You will get output along the lines of:

Screenshot
In the screenshot, I have compiled a DLL as "Any CPU", "x86", and "x64", respectively. You will note that there is a difference in the "PE" and "CorFlags" fields. Both AnyCPU and x86 show a PE value of "PE32"; the x64 shows "PE32+". "PE32+" always indicates 64-bit. For the other two values you have to look at the value of the CorFlags. If its value is 0x1, then you have an assembly that can run on either x86 or x64--the runtime compiler on the host machine will make that determination. If its value is 0x3, then the assembly will be compiled as x86. The "32BITREQ" field also reinforces this.
0
 
LVL 1

Author Comment

by:jimmylew52
ID: 40018436
I get this error:

corflags.exe is not recognized as an internal or external command.

Dotnet 4.0 is installed but a search of the system doesnot find corflags
0
 
LVL 74

Expert Comment

by:käµfm³d 👽
ID: 40018449
My fault:  I misread the documentation. You can acquire that utility by installing the Windows SDK.
0
 
LVL 1

Author Comment

by:jimmylew52
ID: 40018622
So if this is the result of the command for the .dll files:

Version   : v4.0.30319
CLR Header: 2.5
PE        : PE32
CorFlags  : 1
ILONLY    : 1
32BIT     : 0
Signed    : 0

The web app is compiled for 32 bit and not 64 bit?
0
How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

 
LVL 74

Accepted Solution

by:
käµfm³d   👽 earned 500 total points
ID: 40018630
That means it can run on either architecture--the runtime compiler will decide how to compile the IL code into machine code.
0
 
LVL 1

Author Comment

by:jimmylew52
ID: 40018639
That being the case, why am I getting this error?

The error indicates that IIS is in 64 bit mode, while this application is a 32 bit application and thus not compatible.
0
 
LVL 74

Expert Comment

by:käµfm³d 👽
ID: 40018677
What is the exact error message?
0
 
LVL 1

Author Comment

by:jimmylew52
ID: 40018702
exact command and error

C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis -i -enable
The error indicates that IIS is in 64 bit mode, while this application is a 32 b
it application and thus not compatible.
0
 
LVL 1

Author Comment

by:jimmylew52
ID: 40019940
The service is compiled as a 32 bit or 64 bit service. It is currently installed in

Program Files (x86)      and is running as a 32 bit service.  If I uninstall and install in

Program Files       will it run as a 64 bit service?
0
 
LVL 1

Author Comment

by:jimmylew52
ID: 40020326
No, that will not make a difference.

C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis -i -enable

should be run from

C:\WINDOWS\Microsoft.NET\Framework64\v4.0.30319>aspnet_regiis -i -enable
0
 
LVL 1

Author Closing Comment

by:jimmylew52
ID: 40020328
Thanks for your assistance
0

Featured Post

Maximize Your Threat Intelligence Reporting

Reporting is one of the most important and least talked about aspects of a world-class threat intelligence program. Here’s how to do it right.

Join & Write a Comment

What is Node.js? Node.js is a server side scripting language much like PHP or ASP but is used to implement the complete package of HTTP webserver and application framework. The difference is that Node.js’s execution engine is asynchronous and event…
Recently I spent hours debugging an issue in a Rails project where ActiveRecord was causing MySQL errors trying to create a User object of a class at the top level of a Single Table Inheritance model structure.  It turns out `.create` behaves differ…
Use Wufoo, an online form creation tool, to make powerful forms. Learn how to selectively show certain fields based on user input using rules to gather relevant information and data from your forms. The rules feature provides you with an opportunity…
Use Wufoo, an online form creation tool, to make powerful forms. Learn how to choose which pages of your form are visible to your users based on their inputs. The page rules feature provides you with an opportunity to create if:then statements for y…

743 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now