NetBios() API Function, NRC_OSRESNOTAV Return Value ?

Does anyone know the cause for NRC_OSRESNOTAV being returned from the NetBios() API function ?

I have a piece of code executing perfectly on one Windows 2000 Pro machine, giving return value of 0, but on another machine its returning NRC_OSRESNOTAV (35).

Both machines are Win 2k Pro SP2...

Here's what MSDN says:
#define NRC_OSRESNOTAV 0x35 Required OS resources exhausted

Or "Operating system resources were exhausted. The application can retry the command later."

That's kinda vague though.

Yeah I know that, I've looked up the nb30.h file and its in there, but its bloody meaningless :)

I'm having the same problem with a "The device is not currently connected but it is a remembered connection. " error message. You'd think somebody would document these things.:(