Write to mailslot failed

[DougVH]

When using Windows 2000, SNA 4, SP 4 and trying to get a device running cleanly, we're getting the message:
Write to mailslot failed, rc = 64
EXPLANATION
A WriteFile call failed. The return code is shown.

The connection is not active, SNABASE is the only service running.

What is the next step in debugging the problem?

 

[DougVH]

Addional information in a trace shows:

NAP message is full TellNetwork
Number of items in msg 2 TellNetwork
*** Writing mailslot msg to DMOD, Time 1304250 **** TellNetwork
!! Send naptype 12 from box : WHMM0587 to box : * DNMSD_INT
Broadcasting NAP msg type 12 DNMSD_INT
Add version number (major/minor) : 400 0 DNMSV
!! Broadcast naptype 12 from box : WHMM0587 to box : * DNMSS
Copy over boxname DNMSS
Trying transport type 1, tid 0 DNMSS
Broadcast mailslot: message type 12, length 328 source =WHMM0587= DNMSS
WriteFile parameters: handle 604, buffer 0CF8FA90, length 385 SendDatagram
WriteFile to handle 604 returned 64 (40H) SendDatagram
Logging 2 chars, level = 12, msgnum = 561 SNLOG
pLog at 00078D20, pTokenUser at 00078D3C NTLOG
Signaling the Logging thread NTLOG
Mailslot msg sent to transport type 1H, rc = 561 DNMSS
Logging msg id 80000231 num 561 pLog->iLevel 12 string 64 LOGTH

I think the problem is in the "send datagram" task.