Crystal Reports error when deployed..Could not load file or assembly 'log4net - crystal-reports

Please help. I have a web application that was built in VS2010 and we are using the CR plugin for 2010 and everything works perfect on our local machines. When we go to deploy the web application to Server 2008 the application runs fine until we try to get to a report. When we get to a report we receive...
Could not load file or assembly 'log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of its dependencies. The system cannot find the file specified.
We have installed the CR2010 runtimes and the file log4net.dll version 1.2.10.0 is in the GAC so we are not referencing it in the application. When we add it as a reference we get this error no matter where we are in the application, not just on the report pages. Please help!


I received the same error message after accidently installing the x86 version of the crystal reports redist on a x64 machine.
Installing the correct x64 redist fixed the problem - http://downloads.businessobjects.com/akdlm/cr4vs2010/CRforVS_redist_install_64bit_13_0.zip


We just ran into the same problem and it turned out to not (in our case) be the version of the Crystal Reports redist (we installed the 32 bit versions on our 64 bit machines. The way we were able to fix the problem was to
Navigate to your virtual directory Application Pool -> Advanced Settings -> Set Enable 32-Bit Applications to True
and changed the managed pipeline mode from Classic to Integrated. After that we no longer got errors of the missing log4net dll.


We also had the same issue with the 64-bit redistributable installed. In our case, we set the "Enable 32 Bit Applications" setting to FALSE in the advanced Application Pool properties and that resolved the issue.


If you have a x86 development machine and your web server is a 64-bit machine, you may be running into the problem discussed here:
http://social.msdn.microsoft.com/Forums/en-US/vscrystalreports/thread/546059a6-7179-4027-8f16-822ac6dc189a/
Visual Studio is automatically deploying a 32-bit log4net.dll into the 64-bit web server, even if you don't have it referenced in your project. Just delete the log4net.dll from your bin directory once deployment has finished because it's not actually required by the CR runtime to work.


For me I had a VB Application project and under Compile options, I had "Any CPU" selected for Target CPU and I also had the "Prefer 32-bit" checked. When the compiled app ran on a 64 bit machine, which only had the x64 runtime installed it could crash with this error, because it tried running as a 32 bit app and wanted the 32 bit runtime. Unchecking this option and recompiling made it work correctly.


Install Crystal Reports for Visual studio Runtime engine for .NET Framework 64 bit


Solved my problems.
I have 2 NLB 2008 R2 Servers, my IISs are configured to run in x32.
In one server I have installed x64 and x32 SAP redist and I have the error, in second server only the x32 and works.
To get the first server work I uninstalled all versions and reinstalled only x32, but the server start work only after a reboot.
Bye


In my case I had the error while developing with Visual Studio 2022. I did what the other answers here say, installed Runtime 64-bit, because my machine is 64 bit, and then:
(in Visual Studio) Project Debug Properties > Web > Servers > Change Bitness to x64 (using IIS Express)

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Installing Crystal Reports Runtime on Windows Server 2016

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Just remember that the choice of 32-bit vs 64-bit is NOT based on the platform. Even if the machine is 64-bit, you should still install the 32-bit version if your app was compiled for 32-bit.
Similarly, data connectivity (e.g. ODBC) should be 32-bit if the app was compiled for 32-bit.
Also, be aware that if the machine has another application that uses the Crystal runtime, but from another service pack, you might run into conflicts.

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The intuitive thing is to go to https://dev.mysql.com/downloads/workbench/ and select the
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Update 2023: The installer has a button to "download prerequisites" that opens https://dev.mysql.com/downloads/workbench/
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I had the same problem when trying to install the 35mb 64bit version. Kept coming back with requiring Visual C++ 2019...
Poking around found that if I went back to the install page and looked around the 32bit version of MySQL, there are two other installs. I chose to install the 405mb MySql Workbench 8 32bit and was able to install successfully. Albeit, mine was an upgrade from 6 to 8.0.20.

Uninstall the previous MYSQL and download the (Windows (x86, 64-bit), ZIP Archive
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Install Microsoft visual C++ X86 or X64 from this link ( https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist?view=msvc-170 ).

For those seeing this later, I had the same issue with a fresh install of Win11, new PC, and trying to get 8.0.3.1 WB, and got the same dependency error on VC++ 2019. I followed all the same guidance above, and on other threads but it didn't work. The WB installer didn't recognize the VC++ redist pack as being installed.
I went to my old PC, found the old version of VC++ redist, and installed it....voila, WB would install. I used VC++ 14.30.30708, and it worked fine. As of this writing the current version of VC++ redist from the links above, was 14.34.31931
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This usually happens when you have mix of x86 and x64 libraries installed. You should probably uninstall all x86 versions of Microsoft Visual C++ Redistributables and install their x64 bit counterparts (just google them and make sure you download 64 bit version of that library).

Sql Server 2008 R2 Web setup throws application error when starting FixSqlRegistryKey_x86.exe

I have Windows 7 64bit. I had Sql Server 2008 R2 Express installed. I unistalled it and then I tried to install Sql Server 2008 R2 Web. Unfortunatelly on the Setup Support Rules page for 'Consistency validation for SQL Server registry keys' I got 'Failed'. I spent half of a day trying to solve it, but then I assumed that there must be realy something wrong with registry keys and it will be faster just to reinstall Windows.
After formatting the disk and reinstalling Windows 7, rebooting dozen of times I installed all Windows upadtes as well. I also did install some programs like Skype, Thundirbird etc. which has no influence on Sql Server setup.
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My team mate has exactly the same machine as mine. He had no problem with installation (he didnt even need to reinstall Windows).
I run the setup as administrator, from a local folder. I even tried to use the setup files copied from my team mate, for a case if my copy is corrupted. In the setup options I have chosen the 'x64' version.
Any ideas what can be the reason of the problem?

Problem solved.
Someone suggested to me that Web edition should not be installed on Win 7 (just on Windows Server). So perhaps installing a different version would work. My team mate perhaps succeeded acidentially - due to having sql server installed already in express edition... but it is just a guess.
Before I tried to install another edition of SqlServer, I downloaded 2008 Express version and I started the install. From the temporary folder created by the express edition I copied FixSqlRegistryKey_x86.exe file and I had overwritten the problematic file in the Web setup with this file.
I started the setup again. It passed the verification this time. But has crashed on a later point - setup unpacks the installation files to C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\SQLServer2008R2 and runs from it. So I needed to again overwrite the problematic file in this location. Now the installation succeeded.

why the Pyqt application implemented and worked well in VISTA can not run in Windows XP?

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More info would be useful, but this sounds familiar to a problem I had when freezing apps using py2exe. Is this your exact error message?:
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Reinstalling the application may fix the problem.
I managed to get around this by installing the Microsoft Visual C++ 2008 SP1 Redistributable Package from http://download.microsoft.com.
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