How To Fix WA898 - Specify the number of events to be read per access

SAP Error Message - Details

• Message type: E = Error

• Message class: WA - Messages from Workflow Event Manager

• Message number: 898

• Message text: Specify the number of events to be read per access

What causes this issue?

The event queue reads a defined number of events from the queue at
regular intervals, and delivers them. The number of events to be read
is not specified.

System Response

The current value is not accepted.

How to fix this error?

Specify a number of events.

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 WA898 - Specify the number of events to be read per access ?

  Certainly! Here's detailed information about the SAP error message WA898:
  
  SAP Error Message: WA898 - Specify the number of events to be read per access
  
  Cause:
  This message appears when a program or function module that reads event data (such as workflow events, change documents, or other event logs) requires the user or the calling program to specify the number of events to be read in one access or batch. The system expects a parameter that controls how many events should be fetched at a time, but this parameter is missing or set to zero.
  In other words, the system needs to know how many events to process per read operation to optimize performance and avoid reading too many or too few events at once.
  
  When does it occur?
  
  When using function modules or reports that read event data.
  When processing workflow events or change documents in batch mode.
  When a parameter controlling the batch size of event reads is not set or incorrectly set.
  
  
  Solution:
  
  Specify the number of events to be read per access: Provide a valid number (usually a positive integer) for the parameter that controls the batch size of event reads.
  This parameter is often called something like NUMBER_OF_EVENTS, EVENTS_PER_READ, or similar, depending on the program or function module.
  Check the documentation or interface of the function module or report you are using to find the exact parameter name.
  If you are a developer, ensure that the calling program passes a valid value for this parameter.
  If you are an end user running a report, check the selection screen or input fields for an option to specify the number of events to read per access and enter a suitable value.
  
  
  Related Information:
  
  This message is informational and prompts the user or developer to provide a necessary input parameter.
  Reading events in batches helps improve performance and manage system resources efficiently.
  Typical values might range from 10 to 1000 depending on the volume of events and system performance.
  If unsure, start with a moderate number like 100 and adjust based on system response.
  Check SAP Notes or documentation related to the specific function module or report you are using for recommended values.
  
  
  Example:
  If you are using a function module like SWE_EVENT_READ or a similar event reading function, ensure you pass a parameter like:
  CALL FUNCTION 'SWE_EVENT_READ'
    EXPORTING
      max_events = 100
    ...
  Here, max_events specifies the number of events to read per access.
  
  If you provide the exact transaction, report, or function module you are using, I can help you find the exact parameter and usage.
  
  Summary:
  
  
  
  Aspect
  Description
  
  
  
  
  Message
  WA898 - Specify the number of events to be read per access
  
  
  Cause
  Missing or zero value for the number of events to read per batch
  
  
  Solution
  Provide a valid positive integer for the number of events to read per access
  
  
  Related Info
  Helps optimize event reading performance; check function module/report parameters
  
  
  
  
  If you need further help with a specific scenario, please provide more details!