We received an email from McKesson informing us of a maintenance down time for EDI ordering, and here is that email:

This week during our regularly-scheduled weekly maintenance window, our firewalls are being replaced, so internet-based communications to McKesson will be interrupted.  If you receive an error during the time of the scheduled outage, please resend after the time of the outage.  Details of the scheduled outage follow:

Saturday, May 14 9:00pm Pacific to Sunday, May 15 1:00am Pacific

Firewall replacement is scheduled for 9:00pm to 11:00pm; testing from 11:00pm to 1:00am.

Again, if you will be making any internet-based transmissions to McKesson during the above period, you may see transmission failures.  Please resend any failed transmissions after 1:00am Pacific on Sunday, May 15.