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Archive for October, 2010

Problem communicating with Printer – Windows 7

30 Oct

Ok Guys! I found the solution to the nasty “Problem communicating with the printer” AT LAAAST ! I have a lexmark x2480 and I recently upgraded to windows 7 ( I had the same problem with Vista earlier as well) so this problem has nothing to do with your operating system. The mistake I was making was that I first connected the cable and then began installing the setup.exe file. I never got the printer to work after that. Though strangely enough the scanner seems to work. I even enabled bidirectional port but it was no help. I tried unchecking the check box that said “save power….” in the usb port device I accessed using the device manger. No. Nothing works.

finally I found the answer. I uninstalled lemxark. I disabled the firewall. Then Disconnected the cable. Guys this is important you have to disconnect the cable and then only hit setup.exe. You must connect the cable only when the setup asks you to. And it works. I used the setup in my CD which I got when I bought the printer. Despite the fact that my OS is windows 7, 64 bit all works fine!

take care, hope this helps people like me who had to tear my hair apart for 3 hours+. VJ Koganti

 
 

Windows 7 changes in web.config file

30 Oct

After upgrading to Windows 7 I noticed that this line was added in the web.config file: This however causes issues in other systems like XP. So we removed this extra entry today and things are working fine.

 
 

ndows 7 installation causes unable to debug error

30 Oct

26 October
after installing windows 7, my wcf applications and my debug tools in SQL Server 2008 decided that they dont need to work anymore! The workaround: I simply went to components – add remove windows components and then removed .NET 3.5. I then restarted my system and checked the checkboxes for WCF (expand the node and check both checkboxes inside) and voila all things work fine now! During this process I decided it was best to switch the firewall off and then turn it back on in the end and things now work fine! Hurray!

Some of the error messages I used to get after installing windows 7:

>> Unable to Start Debugging on the Web Server
>> System.ServiceModel.AddressAccessDeniedException Your process does not have access rights to this namespace
>> The windows Firewall on this machine is currently blocking remote debugging. Remote debugging requires that the debugger be allowed to recieve information
from the network. Remote debugging also requires DCOM (TCP Port 135) and IPSEC (UDP 4500/ UDP 5000) be unblocked. (in Sql 2008)

I have now fixed all the issues above!
VJ Koganti

 
 

Hot Tip: .NET 3.5 textbox is not editable

30 Oct

Hot Tip: .NET 3.5 textbox is not editable

Just found a strange bug in .NET 3.5 today

A textbox is not editable. You type in something and nothing shows up but white space. I removed the maxLength property and things started working fine again! Oh mate! need to report this bug to the Microsoft .NET team in Seattle.

 
 

executereader does not return output parameter or output parameter is always null

30 Oct

executereader does not return output parameter or output parameter is always null

20 September

Why call Reader.close() ???

If you are using .ExecuteReader method to return reader and dont call the reader.close() then the output parameter wont be set. This is a bug in the way .NET is written even in .NET 3.5