Foreach Loop Over Excel Files Seems 'fragile'

All,


I have a package that loops over ~60 Excel files in a directory. Each
file has three named ranges in it, which I import into different
tables. Sometimes the package runs without a hitch, sometimes it
chokes. But it is intermittent.




If I pull the control flow components out of the foreach loop and
point the Excel connection manager to the specific Excel file that has
caused the package to choke, I get a message in the dataflow component
pointing to the named range that "the metadata of the following output
columns does not match the metadata of the external columns......Do
you want to replace the metadata of the output columns with the
metadata of the external columns?" When I choose 'yes', then the
file will be loaded. then I can put the control flow components back
into the foreach loop and the file will run again, successfully, along
with some more, until it chokes again....


So, first of all, does anyone have any insight into this? Sometimes,
somedays, these files will load with no problems. These exact files;
I am having to reload constantly... Other times, like today, it is a
battle.




Otherwise, is there a way to get Integration Svcs to handle the
metadata issue on the fly???


Any ideas, resources, references, war stories, or good clean jokes
would be appreciated,
Kathryn