DDE Client Experiences Intermittent DDE Disconnects

CAUSE

XTYP_DISCONNECT message is sent by DDEML to the client application under the following scenario:

1. Server is generating frequent calls to DdePostAdvise() on a single data item.
2. Client is making frequent requests to advise/unadvise on the same item.

The client transactions must be of type

   XTYP_ADVSTART | XTYPF_ADVREQ and XTYP_ADVSTOP.
   (Hot links of type XTYP_ADVSTART do not exhibit this problem.)
				

Under these circumstances, when a data packet is generated by the server after DDEML is notified by the client of a request to unadvise but prior to the generation of the ACK for this unadvise, DDEML sends a message of type XTYP_DISCONNECT to the client.