Update:

This is about my stupidest post - the long assignments got me totally confused with where each statement begins and ends.

Anon below has hit the nail on the head - I probably need someone to hit me on the head as well!

Please ignore rest of this post.

Original post - Please ignore

Some of your ifs are ; terminated and some assignments might be missing a ; - not sure if you actually want that:

My comments start with '##'

    $PlaceToPutInformation->{'Memory'}{'HIGHTEC'}{'OverallSize'} = 0
        if (            not exists $PlaceToPutInformation->{'Memory'}{
+'HIGHTEC'}
            {'OverallSize'} ); ## If closed here - useless use of ... 

        
        
        $PlaceToPutInformation->{'Memory'}{'HIGHTEC'}{'OverallSize'} =
        $PlaceToPutInformation->{'Memory'}{'HIGHTEC'}{'OverallSize'} +
+ $3;
        
        
        
        
        $PlaceToPutInformation->{'Memory'}{'HIGHTEC'}{'Memory'}{$6} = 
+0 ## Possible ; missing
        if (
            not
            exists $PlaceToPutInformation->{'Memory'}{'HIGHTEC'}{'Memo
+ry'}
            {$6} ); ## If closed here - useless use of ... 

        $PlaceToPutInformation->{'Memory'}{'HIGHTEC'}{'Memory'}{$6} =
        $PlaceToPutInformation->{'Memory'}{'HIGHTEC'}{'Memory'}{$6} + 
+$3;
        
        $PlaceToPutInformation->{'Memory'}{'HIGHTEC'}{'OutputSection'}
+{$7} =
        0 ## Possible ; missing
        if (
            not exists $PlaceToPutInformation->{'Memory'}{'HIGHTEC'}
            {'OutputSection'}{$7} ); ## If closed here - useless use o
+f ... 

        $PlaceToPutInformation->{'Memory'}{'HIGHTEC'}{'OutputSection'}
+{$7} =
        $PlaceToPutInformation->{'Memory'}{'HIGHTEC'}{'OutputSection'}
+{$7} + $3;
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Cant do better unless there is test input