>>That's a good idea, but why they are not released automatically? Is this
>>behavior normal and documented or I've just discovered a bug, which strangely
>>nobody found before?
>
>Neither. :-) MSKB#Q186088 BUG: Report Variable Not Released After Report Runs

The language in the article is particularly interesting. I've never kept a reference to any variable on the desktop... I rather use memory. And it isn't very informative on the possible causes or types of situations where this may happen.