Dear friends,

   I encountered the above error when more than 32 users accessing the application.  My onconfig.abc file has the following parameters:

DBSERVERNAME    abc             
DBSERVERALIASES abc_tcp
NETTYPE         ipcshm,1,64,CPU
NETTYPE         tlitcp,1,64,CPU
MULTIPROCESSOR  1
NUMCPUVPS       1
SINGLE_CPU_VP   1

   I am running Informix application on:
- SUN Solaris 5.6 with 2xCPU, 1DB RAM
- Informix IDS: 7.24 UC6
- Informix 4GL: 7.20 UD2
- Currently slightly more than 32 concurrent users

   I have read informix manual in order to find out if the above parameters had caused the above error, but not able to.  Below are my questions:
   1) Is the error -25577 caused by above parameters?  If not, what causes it?
   2) Do you recommend to increase NUMCPUVPS to 2 since I have 2 processors?  Does it improve performance by doing so?
   3) Can I have two different protocols (ipcshm & tlitcp) defined as same VP_class (CPU) but each protocol have 1 poll_threads, in fact, there is only one CPU VP?
   4) What are the suggested parameters for best performance?

   Thanks.

Best Regards