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rdisp/tm_max_no in SAP systems as of 740

Updated May 18, 2018

Hello SAP Experts,

While trying to login to the system I am getting a popup message as follows:

Maximum number of connected terminals reached

The following message is traced by the dispatcher developer (dev_disp):

WARNING => DpLogon: overflow of logon table

The following entry is shown in the log of syslog (SM21):

Q0P Maximum number of permitted terminal connections reached

Please help me resolve this issue.


  • 07 Feb 2017 1:15 pm Romil Tripathi Helpful Answer

    As the internal logins are considered as the sum of total number of work process and additional 6. The rdisp/wp_max_no parameter defines the total number of work processes. If this parameter is set as a default or not set than it will assume:

    rdisp/wp_no_dia + rdisp/wp_no_vb + rdisp/wp_no_vb2 + rdisp/wp_no_enq + rdisp/wp_no_btc + rdisp/wp_no_spo + rdisp/wp_no_restricted

    Therefore, following formula should be considered for the size of rdisp/tm_max_no:

    rdisp/tm_max_no = <number of expected users> + <total number of WP> + 6 

  • 07 Feb 2017 1:19 pm Sonia Barwar Helpful Answer

    The number of available login slots is setup with the parameter rdisp/tm_max_no. regarding system up to 740, therefore please refer to the SAP document 1543194.   

    The SAP System as of 740 there is no more system users sessions concept but there are reverse slots to internal logins. Therefore, the size setup in rdisp/tm_max_no should consider the internal logins slots.

    Note: The menu "SM04 > 'User' > User list > with system user" is now not available on SAP systems as of 740