How To Fix PAIS300 - Generate subroutine pool full; start transaction again

SAP Error Message - Details

• Message type: E = Error

• Message class: PAIS - Messages for PA-IS (Ad Hoc Query etc.)

• Message number: 300

• Message text: Generate subroutine pool full; start transaction again

What causes this issue?

A short dump occurred during processing with the following error
message 'GENERATE_SUBPOOL_DIR_FULL'.
As explained in the documentation for the ABAP command
<DS:ABAP.GENERATE>GENERATE</>, a maximum of 36 subroutine pools may be
generated in a roll area.

How to fix this error?

Save your data and start the transaction/application again.

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 PAIS300 - Generate subroutine pool full; start transaction again ?

  The SAP error message PAIS300, which states "Generate subroutine pool full; start transaction again," typically occurs when the system runs out of memory for generating subroutine pools. This can happen in various scenarios, particularly when dealing with large programs or when the system has been running for an extended period without a restart.
  Cause:
  
  Memory Limitations: The subroutine pool is a memory area used by the SAP system to store executable code. If the pool reaches its limit, the system cannot generate new subroutines.
  Large Programs: If you are working with large ABAP programs or have many active programs, this can quickly fill up the subroutine pool.
  Long Uptime: If the SAP system has been running for a long time without a restart, memory fragmentation can occur, leading to inefficient memory usage.
  
  Solution:
  
  Restart the Transaction: As the error message suggests, the first step is to restart the transaction that caused the error. This can sometimes clear temporary memory issues.
  System Restart: If the problem persists, consider restarting the SAP application server. This can help clear the memory and reset the subroutine pool.
  Code Optimization: Review and optimize your ABAP code to reduce the size of the subroutine pool. This can include:
  
  Breaking large programs into smaller, more manageable pieces.
  Removing unused code or subroutines.
  Using function modules instead of subroutines where appropriate.
  
  
  Increase Memory Limits: If you have the necessary permissions and resources, you can increase the memory limits for the subroutine pool in the SAP system configuration. This typically involves adjusting parameters in the instance profile (e.g., abap/heap_area_total).
  Check for Memory Leaks: Investigate if there are any memory leaks in your ABAP programs that could be causing excessive memory consumption.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to PAIS300 for any specific patches or updates that may address this issue.
  Transaction Codes: Use transaction codes like ST22 (Dump Analysis) and SM21 (System Log) to analyze any dumps or logs that may provide more context on the error.
  Performance Monitoring: Use transaction ST03N to monitor system performance and identify any bottlenecks or memory issues.
  
  If the problem continues after trying these solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.