OK I am stuck. Why do I get the error message for each value I try to write? 

open(BIN, '>', $fn)
    or die "Couldn't open file for writing: $!n";

  $len = length $gBuf{$bName}[0];
  print "len is $len, bname is '$bName' \n\n";

  foreach $i (1 ... $len) { 

    # use bigint;

    printf "\n$i; '$gBuf{$bName}[$i]'\n\n";
    binmode BIN;
    printf BIN pack('C', $gBuf{$bName}[$i]); 
  }
  close BIN;

[download]

the output I get, regardless of my "guesses", is about always the same: 

len is 10, bname is 'eps_cm_0_pblk1'
1; '0x00000019'
Argument "0x00000019" isn't numeric in pack at pU.pl line 267.
2; '0x0000001b'
Argument "0x0000001b" isn't numeric in pack at pU.pl line 267.
 : etc etc
10:

[download]

Any help appreciated.

In reply to Creating a binary file problem by gibsonca

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.