sql server - sqlcmd not returning error -

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i running following sqlcmd via power shell 

$dump = sqlcmd -s $server -q $sqlcommand -t $querytimeout -b -h -1 -w

i trying write output screen 

$message = "error while executing sql {0}, error details {1}" -f "$sqlcommand","$dump"  write-warning $message

but $dump empty

i not familiar sqlcmd.exe description of expectations think sqlcmd sending information down error stream. seemingly odd common practice , therefore occurrence.

problem here variable $dump collect information send output stream. can redirect error stream output stream redirector. more information can @ about_redirection

so using following accomplish that:

$dump = sqlcmd -s $server -q $sqlcommand -t $querytimeout -b -h -1 -w 2>&1

the linked document describes 2>&1 as

sends errors (2) , success output (1) success output stream.

now $dump should contain looking for. careful though might contain more information expect.


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