There are three builtin functions to build a reply message to the caller, is used to set the error flag in the return message.
set_error(int error)
set_error(1);
{ // NOTE: E_INVALID is an enum set_error (E_INVALID); set_return_data ("Illegal operation requested"); set_return_data ("\"Fred\" is not a valid main course");}
Where can I find Spel functions documentation?
CA SDM::.SPEL::. set_return_data([int index,] data)