Unable to load file or assembly *.dll

Posted on 2010-04-08
Medium Priority
Last Modified: 2013-11-26
I have recently checked out and dusted off an older project from source safe. I do not know who originally created the .net project -- but i am starting to think that it was created in vs 2003.

I have vs 2008.

When i deploy the site to my dev IIS [local machine] and render it in a web browser i get the following error message:

Parser Error Message: Could not load file or assembly 'FSPI.Security' or one of its dependencies. The system cannot find the file specified. (C:\WIP\PartnerWeb\Partner\Partner\web.config line 41)

Source Error:

Line 39:       <system.web>
Line 40:             <httpModules>
Line 41:                   <add name="FSPIAuthenticationModule" type="FSPI.Security.AuthenticationModule,FSPI.Security"/>
Line 42:             </httpModules>
Line 43:             <trace enabled="false" pageOutput="true" localOnly="false" requestLimit="150"/>

Source File: C:\WIP\PartnerWeb\Partner\Partner\web.config    Line: 41

The dll being referenced appears to be custom written. I am really not sure what to do here?
Do I need to register the dll somehow?
Is the DLL referencing something from VS2003?

I have .net frameworks installed on my local iis dev machine for 1.1, 2.0, 3.0, and 3.5.

I have access to the dll via the Object Browser in VS2008 so I can relay any information needed so as to assist me with my trouble shooting -- I have done some 'googling' but I need some expert help on this one.

Let me know if anyone has any suggestions.


		<sectionGroup name="FSPI">
			<section name="security" type="System.Configuration.SingleTagSectionHandler, System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
		<section name="exceptionManagement" type="Microsoft.ApplicationBlocks.ExceptionManagement.ExceptionManagerSectionHandler,&#xA;            Microsoft.ApplicationBlocks.ExceptionManagement"/>
		<sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089">
			<section name="Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>

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Question by:jsvb1977
  • 2
LVL 10

Accepted Solution

Alpesh Patel earned 2000 total points
ID: 30122718
This is not dll
There will be .vb file in your app_code folder with the name FSPIAuthenticationModule.vb

this  might be custom httpmodule added for security purpose.


Author Comment

ID: 30127061
Thanks - I will look into it.

This was an error which occurred because I was unable to BUILD the project in VS2008. Once I took care of another error in the BUILD process and was able to BUILD the project, this error no longer appeared.

I don't know why I repeatedly capitalized BUILD in the above sentence.


Author Closing Comment

ID: 31712357
Although this did not seem to be the cause of the error the information posted was still helpful.

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