KB25815 - Citrix Listed application fails to launch with error 'Unable to launch your application. Contact your help desk with the following information: Cannot connect to the Citrix Xenapp server'

This article describes an issue with TS bookmarks configured as Citrix listed apps where the error "Unable to launch your application. Contact your help desk with the following information: Cannot connect to the Citrix XenApp server" occurs when user clicks on bookmark.  
 

A user has configured Citrix Terminal Services in the device to access the Citrix resource:




When a user logs on to the device, it lists the Citrix application; as illustrated in the following image:



However, when the user tries to launch any Citrix application, the Unable to launch your application. Contact your help desk with the following information: Cannot connect to the Citrix XenApp Server. The Citrix XenApp server you have selected is not accepting connections error message is generated:

This issue is due to the ICA file not binding to the correct loopback IP address; instead it is binding to some random IP address. The Client debug log from the user' computer displays the following information:




Due to the winsock error, the Replacing with Address part has to be mapped to the appropriate loopback IP address; but it is incorrectly mapped to some random IP address:




To correct the mapping issue, perform the following procedure:
 

1. Open the Command Prompt with administrator rights, type the following command, wait for a status message, and reboot the client's computer:

   netsh int ip reset c:\resetlog.txt

2. Open the CMD Prompt with administrator rights, type the following command, wait for a status message, and reboot the client's computer:

   netsh winsock reset