How To Fix TPDA350 - No exclusive debugging mode available

SAP Error Message - Details

• Message type: E = Error

• Message class: TPDA - Debugger

• Message number: 350

• Message text: No exclusive debugging mode available

What causes this issue?

In "Non-Exclusive Mode", the ABAP Debugger was unable to reserve a
work process exclusively for this debugging session. The reason for this
is that all available work processes were already in use with other
debugging sessions.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Restrictions in "Non-Exclusive Mode":
For every Debugger interaction, a database commit must be triggered.
As a result:
- You cannot debug between "SELECT ... ENDSELECT" (short dump in
Debugger)
- If the debugging session is cancelled, the database content can become
inconsistent.
Since there can be no database inconsistencies in production systems,
the "Non-Exclusive Mode" is not possible there. Instead of starting the
Debugger in "Non-Exclusive Mode", the system triggers the short dump
"DEBUGGING_IMPOSSIBLE".
The number of work processes exclusively available for debugging in
production systems is defined in the profile parameter for the number of
dialog work processes as follows: "rdisp/wp_no_dia / 2"
In non-production systems, this number is set using the profile
parameter "rdisp/wpdbug_max_no". It is recommended that
"rdisp/wpdbug_max_no" is roughly equal to "rdisp/wp_no_dia / 2".
On the other hand, the default value "rdisp/wpdbug_max_no = 1"
is almost always too low.

System Response

How to fix this error?

In the meantime, a work process may have become free for exclusive use
by the Debugger, so that you could try to switch to "Exclusive Mode" by
choosing "Debugger -> Exclusive Debugging Mode On" from the menu.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TPDA350 - No exclusive debugging mode available ?

  The SAP error message TPDA350, which states "No exclusive debugging mode available," typically occurs when a user attempts to start a debugging session in a system that does not support exclusive debugging. This can happen for various reasons, including system configuration, user authorizations, or the current state of the system.
  Cause:
  
  System Configuration: The SAP system may not be configured to allow exclusive debugging. This can happen if the system is set up in a way that does not permit exclusive access to the debugger.
  User Authorizations: The user may not have the necessary authorizations to initiate an exclusive debugging session. This can be due to missing roles or permissions in the user's profile.
  System Load: If the system is under heavy load or if there are too many active sessions, the system may not allow additional exclusive debugging sessions.
  Debugging Mode: The system might be in a mode that does not support exclusive debugging, such as when it is in a production environment or when certain settings are applied.
  
  Solution:
  
  Check System Configuration: Ensure that the system is configured to allow exclusive debugging. This may involve checking the system settings or consulting with your SAP Basis team.
  User Authorizations: Verify that the user has the necessary authorizations to perform debugging. This may involve checking the user's roles and permissions in the SAP system.
  Reduce System Load: If the system is under heavy load, try to reduce the number of active sessions or wait until the system is less busy before attempting to start a debugging session.
  Use Alternative Debugging Methods: If exclusive debugging is not available, consider using other debugging methods, such as using breakpoints in the code or using the ABAP Debugger in a non-exclusive mode.
  Consult SAP Notes: Check for any relevant SAP Notes that may address this issue. SAP frequently updates its knowledge base with solutions to common problems.
  
  Related Information:
  
  Debugging Modes: Understand the different debugging modes available in SAP, such as exclusive and non-exclusive debugging, and when to use each.
  SAP Basis Team: If you are unable to resolve the issue, consider reaching out to your SAP Basis team for assistance, as they may have more insight into system configurations and settings.
  SAP Community: Engage with the SAP Community or forums where other users may have encountered similar issues and can provide insights or solutions.
  
  By following these steps, you should be able to address the TPDA350 error and successfully initiate a debugging session in your SAP environment.