Update failed.

Trying to update the calendar module I am getting the feedback from the update.php function saying it failed update #1 in calendar_ical.module

Err msg:
---
Fatal error: Call to undefined function table_exists() in
/home/httpd/vhosts/surfpurpose.com/httpdocs/sites/all/modules/calendar/calendar_ical.install on line 14
---
What can I do here to get past this? Its preventing me from updating some other modules.