How To Fix RZ378 - You must specify an application server name

RZ378 - Overview

• Message type: E = Error

• Message class: RZ - Messages for Computing Center Management System

• Message number: 378

• Message text: You must specify an application server name

What causes this issue?

Each instance definition must contain a server name.
This must be unique in the system.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Specify a server name or have the system generate a server name. To get
a server name that adheres to the SAP naming convention, perform the
function "Standard settings". The function "Actual settings" copies all
the data of an active server into the instance description; The server
name, under which the server is known to the message server, is copied.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RZ378 - You must specify an application server name ?

  The SAP error message RZ378, which states "You must specify an application server name," typically occurs when there is an issue with the configuration of the SAP system, particularly when trying to connect to an application server. This error can arise in various contexts, such as when using transaction codes that require a connection to a specific application server.
  
  Cause:
  
  Missing Application Server Name: The most common cause is that the application server name has not been specified in the connection settings.
  Incorrect Configuration: The SAP GUI or the connection settings may be incorrectly configured, leading to the inability to identify the application server.
  Network Issues: There may be network issues preventing the SAP GUI from reaching the application server.
  Profile Issues: The user profile or system profile may not have the necessary parameters set for connecting to the application server.
  
  
  Solution:
  
  
  Specify Application Server:
  
  When logging into the SAP system, ensure that you specify the application server