I am having trouble closing one particular spreadsheet.
I am using

$close_res = $workbook->Close();
print "[open_spreadsheet] 1st close result <$close_res>\n";    

$close_res = $workbook->Close();
print "[open_spreadsheet] 2nd close result <$close_res>\n";
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and the messages I get from this are
open_spreadsheet 1st close result <1>
open_spreadsheet 2nd close result <>
The second close was added because of the problem.
However, when I try and move the spreadsheet I get the following

result of moving file is <0>
could not find move file error - number <32> message <The process cannot access
the file because it is being used by another process.

Also I cannot open and file the spreadsheet using Excel until I close the application
that has used this spreadsheet.
I have not had this trouble with other spreadsheets
The original spreadsheet was written by someone else.
Therefore in an attempt to overcome this I copied the cells from the original
to a new spreadsheet.
However, I still got the same problem.
Has any one any idea how to solve this one?