We have some legacy code that's been running just fine for years, but recently we've been getting this error when trying to do recurring billing:
NoMethodError (undefined method `recurring' for #<ActiveMerchant::Billing::AuthorizeNetGateway:0xf52dda34>):
Processing a regular one-time transaction still works perfectly fine, the code is a simple:
ActiveMerchant::Billing::Base.gateway('authorize_net').new(:login => xxx, :password => xxx, :test => xxx)
gateway.recurring( ...)