Command timed out
-3638 indicates that a Windows system call is timing out. The reason for the slow response is something specific to the end user's system, such as a slow network file system, a heavily loaded system, a failing hard drive (or memory), a memory constrained machine pushed into swap, etc.
Solution
Try rebooting the system, and retrying the command before loading the machine with other work. If a network file system is in use, quiescing the network is advised. If that doesn't work, perhaps a sys admin on the customer end can verify whether or not the system is functioning abnormally in some way.
Programmatically, if there is a return of -3638 from NalpLibOpen(), one could call NalpLibClose() and try NalpLibOpen() again. If some other function returns -3638, one could immediately (or after a short sleep) re-try that function.