Code changes done in X++ standard methods of RetailTransactionService* classes or added new methods in RetailTransactionServiceEx class are not 'visible' by Real-Time Service.

Possible solutions

  1. Generate incremental CIL (sometimes full CIL) - this is 'must do' step, because all Real-time service calls are executed in CIL;
  2. Restart Real-time service web site and application pool in IIS;
  3. Restart Windows Process Activation service on the machine where Real-time service web site is installed.

Thanks for reading!