Channel Access Writes Failed on Asyn Record Writable Fields

[William Lu <weiwei@jlab.org>]

I am having problems with channel access writes on asyn record's 
writable fields such AOUT and PORT.  I created the following asyn tcp/ip 
port and the asyn record:

In a startup iocsh script:
 drvAsynIPPortConfigure("sockserv","127.0.0.1:9099",0,0,0)

The asyn record:
 record(asyn, LS450PS:asyn) {
 field(DTYP, "asynRecordDevice")
 field(PORT, "sockserv")
 field(ADDR,"0")
}

After the record has been loaded to the ioc, I cannot write the AOUT or 
PORT fields of the record through channel access.  When I caput on those 
fields, I got the error messages like the following:

>caput LS450PS:asyn.AOUT "abc"
Old : LS450PS:asyn.AOUT
CA.Client.Diagnostic..............................................
   Message: "Could not perform a database value put for that channel"
   Severity: "Warning" Context: "detected by: devl17.acc.jlab.org:5064 
for: LS450PS:asyn - with request chan=LS450PS:asyn.AOUT op=1 data 
type=DBR_STRING count=1"
..................................................................
New : LS450PS:asyn.AOUT

What is the problem?  Any help would be gratefully appreciated.

William Lu
Jefferson Lab

--
Weiwei Lu
757-269-7476
weiwei@jlab.org