We are experiencing intermittent COM port mapping issues with our electronic signature pads in our XenApp 6.5 farm runing HRP04. We map as follows:
net use com1: \\client\com4:
Most of the time the COM port maps successfully and the signature pad works fine. However, we are seeing occassional isues where the user tries to use the signature to sign it does not work. When this happens, we notice that Net Use cmd shows the COM1 as being unavailable. When we issue a 'net use com1: /delete' and attempt to re-map, we receive a 'system error 66'.
When we receive this error, a re-login to the same Citrix server does NOT resolve the issue. But if the user logs in and gets placed onto a different server, the COM port maps fine. After some time passes, we re-attempt to login to the original problematic Cirix server and the COM port resumes mapping again.