I am actually having the exact same problem. Just a couple questions: What OS is the user running? What version of IE is she using? What version of the Receiver is she on? What version of XenApp are you on?

'cannot connect to the citrix XenApp server.Protocol Driver error'” Announcements. Cannot connect to the citrix XenApp server.Protocol Driver error'. Installing XenApp Using the Wizard-Based Server Role Manager. XenApp 6 Security Standards and Deployment Scenarios. Citrix SCOM Management Pack for XenApp 6.x.

Mine is from my home PC, running Win 7 Pro. I had both IE 10 and Chrome installed, put on IE 11, and went back down to IE 9, with the same issue the entire time. Chatpad Driver Windows 8 more.

I have used both the 4.1 and 3.4 Receiver clients. Connecting to a XenApp 6.5 farm. This seems to be happening with all of my applications from here.

Have you tried on more than one of hers? And from what I have heard, I am also the only one having this issue. Try one or all of this: 1-) In IE >Tools >Internet Options >Advanced tab >tick SSL2.0 2-) Uninstall ICA client and reinstall. 3-) User's local profile on the PC rename and ask them to login. 4-) User's profile on Citrix Server rename and ask them to log back in. 5-) Test user on a different computer.

6-) Local firewall on the computer. Even if it's disabled - enable and then try. 7-) AV on the computer. 8-) User's profile on each of the Citrix Servers - delete them and make sure gone from registry if windows 2008. Geforce 9600 Gso Drivers. bak key. 9-) On the trouble user's PC you login and try connecting to Citrix.

10-) This is all I have for now. Hope this helps!

Trouble shooting the Citrix error/ICA message: protocol driver error Introduction I think this is a rather poor chosen error message. Protocol driver error within a Citrix environment can mean so many things. But it comes down to this: the client cannot find the server. So if it were up to me, I’d change this message to ‘The ICA client cannot connect to the XenApp server’, or even sorter; Cannot connect to the Server. Troubleshooting ‘Protocol drive error’ can have so many causes, and here’s a list of things you should check. 1 – Step one is to determine what the problem is, we split that up in 3 groups; • client, the workstation or thin client • transport, network cables/switches/firewall • server, XenApp server/load balancer To determine which is your case is usually fairly simple: How much people have the problem?; 1 – usually the client 2 to department size (50-100) – usually transport (network) All people cannot login; usually server problems These figures are indicative, it is very well possible they don’t count in your case! 2 – Client problems Here’s a list of things you could check; • is the network cable connected • Is the network driver properly installed • check your IP configuration • check for blocking software like firewalls • check for viruses • check your ICA client version Sometimes it faster and easier to just replace the whole client, specially with thin clients.

Or sometimes a reinstall is faster than troubleshooting. 3 – Transport problems At one of the faulty clients; • check the IP configuration; • check network card physically, cable, link LED, follow the cable to the outlet. • check the default gateway, see if you can ping the default gateway • check the DHCP settings • try to resolve one of your XenApp servers at the client • ping one of the XenApp servers • Use telnet or putty.exe to see if the port is blocked somewhere during transport, do a: C:>telnet ctxsvr01 1494 If the ICA protocol is listening you should get a black empty screen, with a few ‘ICA’s appearing.