I believe you want to print $!.  Give it a try.

> Hello
> 
> This does not work.
> 
>      `cp $srcfile $dstfile`; || do {
>       print "cannot copy $srcfile to $dstfile";
>     };
> 
> do is also execute if cp working fine. Whz is this so? The next thing I 
> would like to
> know how I can print the cp's error message.
> 
> Thanks
> 
> Urs
> 
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