https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/My-Canon-1D-Classic-First-1D-has-error-99/m-p/87396#M10838 <P>Error 99 on that body can be caused by many different things including a weak battery. Other than to clean the battery terminals inside the cavity for the battery &amp; the lens terminal set on the lens &amp; in the body there isn't much you can do.</P><P>&nbsp;</P><P>&nbsp;</P><P><A href="http://www.learn.usa.canon.com/resources/articles/2012/eos_error_msgs.shtml" target="_blank">http://www.learn.usa.canon.com/resources/articles/2012/eos_error_msgs.shtml</A></P> Wed, 16 Apr 2014 23:00:04 GMT cicopo 2014-04-16T23:00:04Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/My-Canon-1D-Classic-First-1D-has-error-99/m-p/86898#M10837 <P>My Canon 1D Class (The first 1D) has error 99. Could someone please explain to me what might be the cause and how I can fix it?.. Thanks</P> Wed, 16 Apr 2014 01:43:17 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/My-Canon-1D-Classic-First-1D-has-error-99/m-p/86898#M10837 Locky_Mc 2014-04-16T01:43:17Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/My-Canon-1D-Classic-First-1D-has-error-99/m-p/87396#M10838 <P>Error 99 on that body can be caused by many different things including a weak battery. Other than to clean the battery terminals inside the cavity for the battery &amp; the lens terminal set on the lens &amp; in the body there isn't much you can do.</P><P>&nbsp;</P><P>&nbsp;</P><P><A href="http://www.learn.usa.canon.com/resources/articles/2012/eos_error_msgs.shtml" target="_blank">http://www.learn.usa.canon.com/resources/articles/2012/eos_error_msgs.shtml</A></P> Wed, 16 Apr 2014 23:00:04 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/My-Canon-1D-Classic-First-1D-has-error-99/m-p/87396#M10838 cicopo 2014-04-16T23:00:04Z