This all started when my client couldn't see a record on a list view but I could. They were running FMP 15.0.2 - I don't know if it was the version that cause the record not to show? So I ran the update to 126.96.36.1995 - this broke the send mail script.
Both Outlook and FMP are 64-bit. the OS is Windows 7 Pro 64 bit.