caget: Identical process variable names on multiple servers

["J. Lewis Muir via Tech-talk" <tech-talk@aps.anl.gov>]

Hello, Tech-Talkers!

I was running (but names and IP addresses have been changed for this
message)

----
caget -w 15 ioc23:Sensor1:Temp ioc23:Sensor1:Humid
----

in a script every minute, and it worked fine for a number of hours, but
then I got the following warning, and caget exited with a nonzero exit
status.  This is very rare because I have run similar scripts in the
past for hours or days and have never encountered this error.  And even
now, the command works fine.  Anyone know what went wrong?

----
CA.Client.Exception...............................................
    Warning: "Identical process variable names on multiple servers"
    Context: "Channel: "ioc23:Sensor1:Temp", Connecting to: 0.0.0.1:5, Ignored: ioc23:5064"
    Source File: ../cac.cpp line 1321
    Current Time: Sun Nov 09 2025 23:36:55.795306015
..................................................................
CA.Client.Exception...............................................
    Warning: "Identical process variable names on multiple servers"
    Context: "Channel: "ioc23:Sensor1:Humid", Connecting to: 0.0.0.2:5, Ignored: ioc23:5064"
    Source File: ../cac.cpp line 1321
    Current Time: Sun Nov 09 2025 23:36:55.795338040
..................................................................
----

The script was running on a computer with IP address 10.0.9.80, and the
PVs were on an IOC with host name ioc23 and IP address 10.0.9.14 on the
same network.

This is with EPICS 7.0.8.1.

Other potentially relevant info from the computer that the script was
running on:

----
$ cainfo ioc23:Sensor1:Temp
ioc23:Sensor1:Temp
    State:            connected
    Host:             ioc23:5064
    Access:           read, write
    Native data type: DBF_DOUBLE
    Request type:     DBR_DOUBLE
    Element count:    1

$ cainfo ioc23:Sensor1:Humid
ioc23:Sensor1:Humid
    State:            connected
    Host:             ioc23:5064
    Access:           read, write
    Native data type: DBF_DOUBLE
    Request type:     DBR_DOUBLE
    Element count:    1

$ env | grep EPICS
EPICS_CA_ADDR_LIST=10.0.9.255 192.168.0.2
EPICS_HOST_ARCH=linux-x86_64
EPICS_CA_MAX_ARRAY_BYTES=20000000
EPICS_CA_AUTO_ADDR_LIST=NO
----

Other potentially relevant info from the ioc23 computer hosting the PVs:

----
$ env | grep EPICS
EPICS_CA_ADDR_LIST=10.0.9.255 192.168.0.2
EPICS_HOST_ARCH=linux-x86_64
EPICS_CA_MAX_ARRAY_BYTES=20000000
EPICS_CA_AUTO_ADDR_LIST=NO
----

I read the release notes for EPICS 7.0.9 and didn't see anything that
looked like a relevant change.

I searched the Tech-Talk archives and found the following, but I don't
think they're the same as my problem (but if one is, I think the first
one is more likely to be my problem):

* https://epics.anl.gov/tech-talk/2023/msg00547.php 
* https://epics.anl.gov/tech-talk/2021/msg00329.php 

Thank you!

Lewis