Thanks for the suggestion grandfather but my problem is even after using 2>&1 as shown above,I still see stderr (not in client view messages)getting printed on the command prompt.I want to save it to the same variable "$p4where_output" and then proceed further

I wasn't addressing your primary problem (although if you are using linux then try &2>1), but what appears to be a separate bug that will manifest itself when the current blocker bug is fixed.

True laziness is hard work

Hi, I am new to open3 and perldoc is too vague to understand I am trying a simple perforce command to run in open3.Basically I want to capture both STDOUT and STDERR aswell.I have tried various ways but none of them seem to be working.I am hoping someone will comment.

foreach my $file (@changed_files)
{
    
#my $p4where_output=`p4 where $file > NUL: 2>&1`;#backticks option not
+ working,so commented out
#print "P4 where output:$p4where_output\n";

my $cmd = "p4 where $file";

local(*HIS_IN, *HIS_OUT, *HIS_ERR);

my $childpid = open3(*HIS_IN, *HIS_OUT, *HIS_ERR, p4 where $cmd);
print HIS_IN "stuff\n";
close(HIS_IN);            # Give end of file to kid.
my @outlines = <HIS_OUT>;    # Read till EOF.
my @errlines = <HIS_ERR>;    # XXX: block potential if massive
print "STDOUT:\n", @outlines, "\n";
print "STDERR:\n", @errlines, "\n";
print @errlines;
close HIS_OUT;
close HIS_ERR;
waitpid($childpid, 0);
if ($?) {
    print "That child exited with wait status of $?\n";
}

        if(@errlines eq 'file(s) not in client view')
        {
        push @changed_paths,"$file\n";
        }
}
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