How To Fix DMCLG342 - Start of access plan calculation

SAP Error Message - Details

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 342

• Message text: Start of access plan calculation

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 DMCLG342 - Start of access plan calculation ?

  The SAP error message DMCLG342, which indicates an issue with the "Start of access plan calculation," typically arises in the context of database access plans and query optimization. This error can occur in various scenarios, particularly when the system is trying to execute a query or access data in a way that is not optimal or when there are issues with the database configuration.
  Causes:
  
  Database Configuration Issues: The database may not be properly configured, leading to problems in generating access plans.
  Statistics Outdated: The database statistics may be outdated or missing, which can prevent the optimizer from creating an efficient access plan.
  Complex Queries: The query being executed may be too complex or involve too many joins, leading to difficulties in calculating an access plan.
  Resource Limitations: Insufficient system resources (CPU, memory) can hinder the optimizer's ability to calculate access plans.
  Database Locks: Locks on the database tables can prevent the optimizer from accessing the necessary data to create an access plan.
  
  Solutions:
  
  Update Database Statistics: Ensure that the database statistics are up to date. This can often be done using database management tools or commands specific to your database system.
  Optimize Queries: Review and optimize the SQL queries being executed. Simplifying complex queries or breaking them into smaller parts can help.
  Check Database Configuration: Review the database configuration settings to ensure they are optimal for your workload.
  Monitor System Resources: Check the system resources (CPU, memory, disk I/O) to ensure that there are no bottlenecks affecting performance.
  Release Locks: Investigate and resolve any locks on the database that may be preventing access plan calculations.
  Database Maintenance: Perform regular database maintenance tasks, such as reindexing and cleaning up unused data, to improve performance.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to DMCLG342 for any specific patches or updates that may address this issue.
  Database Documentation: Refer to the documentation for your specific database (e.g., HANA, Oracle, SQL Server) for best practices on query optimization and performance tuning.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found effective.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your database administrator or SAP support for further assistance.