Experimental Physics and
Industrial Control System

Dirk Zimoch <[email protected]> · Wed, 28 Feb 2007 16:49:28 +0100

Hi all,
I got a strange effect with ca_sg_put if writing to a record where DISP=1.
The ca_sg_put succeeds (returns ECA_NORMAL) but then,
an error message is printed asynchronously:
CA.Client.Exception...............................................

Warning: "Channel write request failed"

Context: "op=1, channel=DZ-AO3, type=DBR_invalid, count=0, ctx="write
notify request rejected""

Source File: ../syncGroupWriteNotify.cpp line 98

Current Time: Wed Feb 28 2007 16:40:34.421658000

..................................................................
Finally, ca_sg_block times out, long after it was clear to CA that writing failed.
Especially the last point is strange to me. Is this a bug or is it designed this
way?

If it works as intended, what is the correct way to handle failing synchronous
writes to records with DISP=1 without timing out?
I am using R3.14.8.2.
Dirk

--
Dr. Dirk Zimoch
Computing and Controls
Paul Scherrer Institut
phone +41 56 310 5182
fax   +41 56 310 4413

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System