Issue:  When exporting the Bill of Material reports to XLS output some of the items are truncating or corrupting the information that is exported out of the system. 

Answer or Possible Solution:  Check the description loaded for that item and make sure that it does not start with a quotation mark.  During exporting of the files to XLS the excel does not like the quotation mark and may cause truncating or corrupting results.  Please make sure that there are no quotation mark as the first character of the description, and that should resolve the issue.