Dispatcher is unable to start(ERROR => ShmProtect(SHM_PROFILE [dpxxprf.c 494])

1. Go to /usr/sap/NBD/DVEBMGS00/work and check the file dev_disp.new.

2.Check the instance profile by the below command and if any error found  solve the error by solution given in the output of "sappfpar"
Go to /sapmnt/SID/profile
sappfpar check pf=START_DVEBMGS00_HOSTNAME.

3.After solve the errors in instance profile if dispatcher didn't start follow below steps.

ipcs -m

cleanipc 00 remove