Following this line of thought there is this line in your MyConfig.pm or config setting display:

...
    tar                [/usr/bin/tar]
...
[download]

Maybe change it to /bin/tar. Or wherever it is...

You have put your finger on the problem

I ran the following script (via cron):

#!/bin/bash

cd ~/.cpan/build/GAAS-fwrgdL/

/usr/bin/tar -xvvf MIME-Base64-Perl-1.00.tar
[download]

with the following result:

/home/washburn/scripts/TestTar.sh: line 5: /usr/bin/tar: No such file 
+or directory
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I then followed the above advice and changed the MyConfig.Pm line:

  'tar' => q[/usr/bin/tar],

to

  'tar' => q[/bin/tar],

and ran (via cron)

cpan MIME::QuotedPrint::Perl

which worked and produced the following email:

Read more... (5 kB)

I should have run this

ls -lg /usr/bin/tar
ls: /usr/bin/tar: No such file or directory
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before bothering the perl monks.