I have just installed a fresh EBS - R12 on linux VM box here is the fun message:hurray i got back when try to run a simple request to check active users. " The concurrent manager defined to process this request is not active in the current work shift. The request will not process within this work shift. " The ran adcmctl.sh status Got: Internal concurrent manager status could not be determined The checked : /home/Oracle/Prod/inst/apps/Prod_linux/log/appl/conc/log/Prod: Starting PROD_0408@PROD Internal concurrent manager Shell Process ID 7188 Found dead process: spid=(7239), cpid=(13808), ORA pid=(23), manager=(0/1) could not find service instance context for service instance number 6269 /home/Oracle/Prod/inst/apps/Prod_linux/log/appl/admin/log/adcmctl.txt === adcmctl.sh : shutting down concurrent manager for PROD.... Oracle password: Submitted reques 391203 for concurrent FND SHUTDOWN === You are running adcmctl.sh version 120.12010000.3 Questions.... After doing so research i notice some of the simple test to do is to run diag test (i dont know the syntax) Run Cmclean.sql (dont know the systax and where to find it) A straight forward step on the troubleshooting CM will be thorough appreciated from the my EBS gurus out there. Thanks for reading cheers ..