1. @sorted_original_cellnames
2. @sorted_top_cellnames

##</code><code>##

@test1{@sorted_original_cellnames} = undef;
  		@not_found_in_original = grep{!exists $test1{$_}}@sorted_top_cellnames;

##</code><code>##

@test2{@sorted_top_cellnames} = undef;
  		@not_found_in_topcell = grep{!exists $test2{$_}}@sorted_original_cellnames;

##</code><code>##

Use of uninitialized value in exists at checkmodlist.pl line 355.
Use of uninitialized value in hash slice at checkmodlist.pl line 358.