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`sqlcmd' withholding error messages?

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From	Anton Shepelev <anton.txt@g{oogle}mail.com>
Newsgroups	comp.databases.ms-sqlserver
Subject	`sqlcmd' withholding error messages?
Date	Thu, 11 Aug 2022 13:10:35 +0300
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Greetings to master Erland and all good people prefer-
ring the cleanliness and freedom of  Usenet  to  clut-
tered  and centralised web-based media. On a dedicated
machine I host many SQL Server instances  and  perform
some  regular  maintenance operations via `sqlcmd' in-
voked in a batch script in a loop over a file  with  a
list  of instances. The relevant fragment is shown be-
low:

for /F %%f in (instances.txt) do (
   sqlcmd -A -r 0 -b -l 4 -t 120 -S SBOSQL%f -i %SCR_PAT%%s 2> error.txt
   IF ERRORLEVEL 1 (
      echo %DATE% %TIME%:                      >> errors.txt
      echo Error invoking %SCR_PAT%%s for %%f: >> errors.txt
      type error.txt                           >> errors.txt
      echo --                                  >> errors.txt
   )
   del error.txt
)

Most of the time is works as expected, but on rare oc-
casion the log file will contain error entries with an
empty message, e.g.:

   Thu 08/11/2022 13:04:12.46:
   Error invoking mem_bal _mem_balance.sql for SBO35:
   --

Which means that `sqlcmd' returned an error  code  yet
did not print any message to standard output. Do I in-
voke it incorrectly?

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`sqlcmd' withholding error messages? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-11 13:10 +0300
  Re: `sqlcmd' withholding error messages? Erland Sommarskog <esquel@sommarskog.se> - 2022-08-12 22:45 +0200
    Re: `sqlcmd' withholding error messages? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-19 17:52 +0300
  Re: `sqlcmd' withholding error messages? Luuk <luuk@invalid.lan> - 2022-08-19 17:44 +0200
    Re: `sqlcmd' withholding error messages? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-22 12:39 +0300
      Re: `sqlcmd' withholding error messages? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-22 17:46 +0300

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