Drupal error

My CMS drupal website was working fine. suddenly I start getting the below error:

Fatal error: Call to undefined function phptemplate_body_class() in /var/www/vhosts/blominvestksa.com/httpdocs/sites/all/themes/danland/page-front.tpl.php on line 65

Please assist
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ramziabkAsked:
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GaryCommented:
Have you just updated Drupal?
Try reinstalling the theme
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ramziabkAuthor Commented:
Thanks for your reply.
No I didn't update drupal.How to reinstall the theme?
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GaryCommented:
Just upload a clean version (assuming you haven't made any changes to it)
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ramziabkAuthor Commented:
did that. Installed Danland theme again but still same error.
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GaryCommented:
Remove the theme, clear you cache, check if site is working
Upload theme again and clear cache

If still not working you may need to contact the theme author
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