How To Fix FK091 - Communication error: &

SAP Error Message - Details

• Message type: E = Error

• Message class: FK - Factory calendar

• Message number: 091

• Message text: Communication error: &

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 FK091 - Communication error: & ?

  The SAP error message FK091, which indicates a "Communication error," typically arises during the processing of financial documents, particularly in the context of the SAP Financial Accounting (FI) module. This error can occur due to various reasons, including issues with the connection to the database, problems with the application server, or network-related issues.
  Causes of FK091 Communication Error
  
  Network Issues: Problems with the network connection between the SAP application server and the database server can lead to communication errors.
  Database Connection Problems: If the database is down or there are issues with the database configuration, it can result in this error.
  Application Server Issues: If the application server is overloaded or experiencing performance issues, it may not be able to communicate effectively with the database.
  Timeouts: Long-running transactions may exceed the timeout settings, leading to communication errors.
  Configuration Issues: Incorrect settings in the SAP system configuration can also lead to communication problems.
  Transport Layer Issues: Problems in the transport layer, such as issues with the SAP kernel or network protocols, can cause communication errors.
  
  Solutions to FK091 Communication Error
  
  Check Network Connectivity: Ensure that there are no network issues between the application server and the database server. You can use tools like ping or traceroute to diagnose connectivity problems.
  Database Status: Verify that the database is up and running. Check for any database-related errors or logs that might indicate issues.
  Review Application Server Logs: Check the application server logs for any errors or warnings that might provide more context about the communication error.
  Increase Timeout Settings: If the error is due to timeouts, consider increasing the timeout settings in the SAP system configuration.
  Restart Services: Sometimes, simply restarting the application server or database services can resolve transient communication issues.
  Check SAP Notes: Look for relevant SAP Notes in the SAP Support Portal that might address this specific error or provide patches or updates.
  Consult Basis Team: If the issue persists, it may be necessary to involve your SAP Basis team to perform a deeper analysis of the system configuration and performance.
  
  Related Information
  
  SAP Support Portal: For specific SAP Notes related to FK091, you can search the SAP Support Portal for updates or patches.
  Transaction Codes: You may want to use transaction codes like SM21 (System Log) or ST22 (Dump Analysis) to gather more information about the error.
  Performance Monitoring: Tools like ST03 (Workload Analysis) can help identify performance bottlenecks that may be contributing to the communication error.
  
  If the problem continues after trying the above solutions, it may be necessary to escalate the issue to SAP support for further assistance.