The simplest way to handle errors is eval block. It acts like java try{}catch{} statement. For example:

eval{ ...code...};
if ($@) { handle error }
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For complex error handling Error.pm module exists. It's very useful for scripts with an object-oriented structure. Example:

use Error;

try{
  do something...
}catch Error::Simple with{
  handling...
}finally{
  ...
}
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Looks like Java code :-)