Experimental Physics and
Industrial Control System



Hi Mark,

Did you try R7? Guess you are with R3.14 or 3.15?

 

There was a tech-talk thread seems quite similar with yours.

https://epics.anl.gov/tech-talk/2022/msg01430.php

The original EPICS version was with R3.15.9.

When I was trying the same db file with R7.0.3, its example db works fine.

 

Thanks,

Guobao

 

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>
Date: Sunday, June 11, 2023 at 12:49 PM
To: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Optional record alias

Folks,

 

This is my first time trying to use a record alias.

 

I would like to have a database file that looks like this:

 

record(bi, "$(P)$(R)")

{

    field(DESC, "$(DESC=)")

    field(DTYP, "asynUInt32Digital")

    field(INP,  "@asynMask($(PORT),$(ADDR),$(MASK))DIGITAL_INPUT")

    field(ZNAM, "$(ZNAM=Low)")

    field(ZSV,  "$(ZSV=NO_ALARM)")

    field(ONAM, "$(_ONAM_=High)")

    field(OSV,  "$(OSV=NO_ALARM)")

    field(SCAN, "I/O Intr")

    alias(      "$(ALIAS=)")

}

 

The DESC macro defaults to an empty string, which is works fine.  I would also like to have the ALIAS macro be optional, so that one can optionally define a record alias.  This does not work, it leads to this error when loading the database.

 

dbLoadRecords: failed to load '$(MEASCOMP)/measCompApp/Db/measCompBinaryIn.template'

Error: Error: Record/Alias name can't be empty

at or before ')' in file "/corvette/home/epics/support/measComp-4-1/measCompApp/Db/measCompBinaryIn.template" line 11

Error: syntax error

 

Is it possible to have an optional ALIAS?

 

Thanks,

Mark