Conversion from type 'DBNull' to type 'String' is not valid

[sbartley]

when i have gone to login this morring to the web console i get the error bellow i need help

InvalidCastException: Conversion from type 'DBNull' to type 'String' is not valid.]
Microsoft.VisualBasic.CompilerServices.Conversions.ToString(Object Value) +591
ASP.state_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) +529
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +2113547
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +24
System.Web.UI.Page.Render(HtmlTextWriter writer) +26
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1896


so I reinstalled version 3.2 not i get there was an error connectioj to sql server on the main lansweeper page i have checked the name pipes in sql server all look ok

Thank you

[Baxter26]

I got the exact same problem this morning. I updated yesterday

Here is all of the message I get.

Server Error in '/lansweeper32' Application.
--------------------------------------------------------------------------------

Conversion from type 'DBNull' to type 'String' is not valid.
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.InvalidCastException: Conversion from type 'DBNull' to type 'String' is not valid.

Source Error:

The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:

1. Add a "Debug=true" directive at the top of the file that generated the error. Example:

<%@ Page Language="C#" Debug="true" %>

or:

2) Add the following section to the configuration file of your application:

<configuration>
<system.web>
<compilation debug="true"/>
</system.web>
</configuration>

Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.

Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.

Stack Trace:


[InvalidCastException: Conversion from type 'DBNull' to type 'String' is not valid.]
Microsoft.VisualBasic.CompilerServices.Conversions.ToString(Object Value) +591
ASP.state_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) +529
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +98
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20
System.Web.UI.Page.Render(HtmlTextWriter writer) +26
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2558




--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433

[sbartley]

here is the screen shot if it helps :

[sbartley]

also looking at the data base being populated ok

[sbartley]

I have reinstaled lansweeper no change managed to get it back to a working state after deleteing any computer that was scaned on that day. done a test scan of one of the server all seemed ok but looked at again today have now got a runtime error funny thing is if i have a look in lansweeper manager you can see all the pc thers a couple that are showing up in red (never scaned ) but mosted look good. if you tell me how to get more infomation out i can help you that way.

[Hemoco]

If possible could you post a complete screenshot of this error please (so I can see a line number of something helpful)

[kfluk]

I got same problem after update to 3.2u1 and update and new lsclient.exe.
Do you have any solution? thx.