Undefined offset: 0(58)

#0 /home/storage/0/52/39/equilibra2/public_html/system/module/wxmail.class.php(58): error::error_handler()
#1 /home/storage/0/52/39/equilibra2/public_html/system/sys.error/error.class.php(419): wxmail->send(8192, 'Undefined varia...', '/home/storage/0...', 227, NULL)
#2 /home/storage/0/52/39/equilibra2/public_html/system/sys.error/error.class.php(97): error::sendError(Object(ErrorException))
#3 [internal function]: error::exception_handler()
#4 {main}

[Exception]
Undefined variable: curso
/home/storage/0/52/39/equilibra2/public_html/system/app/wxcurso/wxcurso.class.php(227)

[BACKTRACE]
/home/storage/0/52/39/equilibra2/public_html/system/app/wxcurso/wxcurso.class.php (31)/home/storage/0/52/39/equilibra2/public_html/system/sys.control/wxcontrol.class.php (330)/home/storage/0/52/39/equilibra2/public_html/system/sys.control/wxcontrol.class.php (226)/home/storage/0/52/39/equilibra2/public_html/system/sys.control/wxcontrol.class.php (226)/home/storage/0/52/39/equilibra2/public_html/system/sys.control/wxcontrol.class.php (226)/home/storage/0/52/39/equilibra2/public_html/system/sys.control/wxcontrol.class.php (375)/home/storage/0/52/39/equilibra2/public_html/system/sys.control/wxcontrol.class.php (171)/home/storage/0/52/39/equilibra2/public_html/system/sys.control/wxcontrol.class.php (146)/home/storage/0/52/39/equilibra2/public_html/system/frontcontroler.php (163)/home/storage/0/52/39/equilibra2/public_html/system/frontcontroler.php (78)/home/storage/0/52/39/equilibra2/public_html/index.php (155)