SUM upgrade SAP Netweaver from 7.31 to 740 was canceled in the STARTSAP_NBAS phase with the error of “ipc/shm_psize_40″ parameter value and solved with the following steps that you can find in this article…

You can find the error screen of SUM upgrade process in the below picture ;

We can find the detail information in the log files like below ;

As you can see in  the above picture of the log file, system says that; size of the shared memory pool 40 is too small, and also you can find the solution suggestion in the below lines of this error description.

Proposal is assigning of the value of 1794000000 to the parameter ipc/shm_psize_40 

Also we can check the situation with the command “sappfpar” like below structure ;

sappfpar check pf=<Profile File>

For our case, output came like this ;

You can see the error line in the above picture, now we shoud change the parameter value with the value of system suggestion ;

Let’s check with the sappfpar command again after the profile value change and to be sure that there is no error detected like below output ;

Vola…Now you can continue your SUM process with REPEAT button…