ArrayIndex Exception error

Hi Guys,

I tried search but it's not working.

Just today we had a few emails that didn't create tickets automatically. From the logs it says:
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System Log Message : ArrayIndex Exception
Module: MAIL_FETCHING
sub module: -
type: Error
Probable Cause: Mail count mismatch while processing mails in ServiceDesk application. Possible reason : More than one application might be pointing to same mail box for mail processing. Please check if any test installation of ServiceDesk application is pointing to the same mail box.
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We don't have any test installation in place.

Can you let me know what else can cause this.

Thanks

BR,
Issa