Raw data communication bytes are stored in a string. I'm trying to "unstuff" DLE characters by replacing pairs of DLE with a single DLE. Looks like the match part is working, but the replacement string is not expanding properly ??? Other suggestions also welcomed. Thanks ! 
#!/usr/bin/perl -w
use strict;
use constant DLE=>0x10;
my $dle = sprintf ("%02X", DLE);
my $msg = pack ("CCCCC", 0x31, 0x32, 0x10, 0x10, 0x33);
# match $dle's expanded, replacement is not expanded ?
$msg =~ s/\x{$dle}\x{$dle}/\x{$dle}/g;
printf ("%02x " x length($msg) . "\n", unpack ("C*", $msg));

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[scott@localhost test]$ ./test.pl
Illegal hexadecimal digit '$' ignored at ./test.pl line 7.
31 32 00 33
[scott@localhost test]$

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In reply to Why is variable interpolation suppressed in \x{$xxx} replacement ? by Anonymous Monk

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