How To Fix MDC_HDB_MTC031 - Error opening SQL connection

MDC_HDB_MTC031 - Overview

• Message type: E = Error

• Message class: MDC_HDB_MTC - Message class for master data consolidation matching

• Message number: 031

• Message text: Error opening SQL connection

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message MDC_HDB_MTC031 - Error opening SQL connection ?

  The SAP error message MDC_HDB_MTC031, which indicates an error opening an SQL connection, typically arises in the context of SAP HANA database connections. This error can occur due to various reasons, and understanding the cause is essential for troubleshooting. Here are some common causes, potential solutions, and related information:
  Causes:
  
  Network Issues: There may be network connectivity problems between the application server and the HANA database server.
  Database Unavailability: The HANA database might be down or not reachable due to maintenance or unexpected outages.
  Configuration Errors: Incorrect configuration settings in the connection parameters (like host, port, user credentials) can lead to connection failures.
  Resource Limitations: The HANA database may be experiencing resource constraints (e.g., memory, CPU) that prevent new connections from being established.
  Firewall Restrictions: Firewalls or security groups may be blocking the necessary ports for the connection.
  Driver Issues: The database driver used to connect to HANA may be outdated or incompatible.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like