How To Fix PU745 - Target system &1.&2 rejects calls from system &3.&4

SAP Error Message - Details

• Message type: E = Error

• Message class: PU - Upgrade and Transport Log Messages

• Message number: 745

• Message text: Target system &1.&2 rejects calls from system &3.&4

What causes this issue?

System &V1&.&V2& was called by system &V3&.&V4&. The target system does
not recognize the source system &V3&.

System Response

The function is canceled.

How to fix this error?

You must register system &V1&.&V2& with system &V3&.&V4&. You can do
this in one of the following ways:
You can link the domains using a domain link.
You can add the target system to the domain of the source system.
Only when using Central CTS in SAP Solution Manager:
Central CTS can work with all systems registered in the Landscape
Management Database (LMDB) of SAP Solution Manager.
Check the configuration of system &V1&.&V2& in the LMDB and correct it
if necessary. For more information, see the LMDB documentation under
"Registering Technical Systems in LMDB" on the SAP Help Portal under
http://help.sap.com/solutionmanager. Search for the relevant
documentation for your release.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PU745 - Target system &1.&2 rejects calls from system &3.&4 ?

  The SAP error message PU745 indicates that the target system is rejecting calls from the source system. This typically occurs in scenarios involving remote function calls (RFC) or when trying to access a system via a connection that has not been properly configured or authorized.
  Cause:
  
  Authorization Issues: The user or system trying to make the call does not have the necessary authorizations in the target system.
  Connection Configuration: The RFC destination may not be correctly configured, or the target system may not be set up to accept calls from the source system.
  Network Issues: There may be network problems preventing the source system from reaching the target system.
  System Status: The target system may be in a state that does not allow it to accept calls (e.g., it may be down for maintenance).
  Client-Specific Settings: The target system may have client-specific settings that restrict access from certain clients or systems.
  
  Solution:
  
  Check Authorizations: Ensure that the user or system making the call has the necessary authorizations in the target system. This can be done by checking user roles and profiles.
  Verify RFC Destination: Go to transaction SM59 in the source system and check the configuration of the RFC destination pointing to the target system. Ensure that the connection type, target host, and system number are correct.
  Test Connection: Use the "Connection Test" feature in SM59 to verify that the connection to the target system is working properly.
  Check System Status: Ensure that the target system is up and running and is not in a maintenance mode or down for any reason.
  Review Network Configuration: Check for any network issues that might be preventing communication between the two systems. This may involve checking firewalls, VPNs, or other network configurations.
  Client-Specific Settings: If applicable, review any client-specific settings in the target system that may restrict access.
  
  Related Information:
  
  Transaction Codes: 
  
  SM59: RFC Destinations
  SU01: User Maintenance (to check user authorizations)
  ST22: Dump Analysis (to check for any runtime errors)
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to this error message.
  Logs: Check system logs (SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  If the problem persists after checking the above points, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.