===================================================================================
[lm17773@it038146 ~]$ cd /opt/midas_software/midas/bin/
[lm17773@it038146 bin]$ fetest
Frontend name          :     fetest
Event buffer size      :     10485760
User max event size    :     4194304
User max frag. size    :     4194304
# of events per buffer :     2

Connect to experiment sampleexpt...
[fetest,ERROR] [odb.cxx:1646:db_open_database,ERROR] Removed ODB client 'Logger', index 1 because process pid 22659 does not exists
[fetest,ERROR] [odb.cxx:1646:db_open_database,ERROR] Removed ODB client 'mhttpd', index 2 because process pid 20257 does not exists
[fetest,INFO] Removed open record flag from "/Experiment/Security/RPC hosts/Allowed hosts"
[fetest,INFO] Removed exclusive access mode from "/Experiment/Security/RPC hosts/Allowed hosts"
[fetest,INFO] Removed open record flag from "/Experiment/Security/mhttpd hosts/Allowed hosts"
[fetest,INFO] Removed exclusive access mode from "/Experiment/Security/mhttpd hosts/Allowed hosts"
[fetest,INFO] Removed open record flag from "/Logger/Channels/0/Settings"
[fetest,INFO] Removed exclusive access mode from "/Logger/Channels/0/Settings"
[fetest,INFO] Removed open record flag from "/Logger/Channels/0/Statistics"
[fetest,INFO] Removed exclusive access mode from "/Logger/Channels/0/Statistics"
[fetest,INFO] Removed open record flag from "/Logger/History"
[fetest,INFO] Removed exclusive access mode from "/Logger/History"
[fetest,INFO] Removed open record flag from "/Sequencer/State"
[fetest,INFO] Removed exclusive access mode from "/Sequencer/State"
[fetest,INFO] Removed open record flag from "/History/LoggerHistoryChannel"
[fetest,INFO] Removed exclusive access mode from "/History/LoggerHistoryChannel"
[fetest,INFO] Removed open record flag from "/Equipment/slow/Variables"
[fetest,INFO] Removed exclusive access mode from "/Equipment/slow/Variables"
[fetest,INFO] Removed open record flag from "/Equipment/Trigger/Statistics/Events per sec."
[fetest,INFO] Removed exclusive access mode from "/Equipment/Trigger/Statistics/Events per sec."
[fetest,INFO] Removed open record flag from "/Equipment/Trigger/Statistics/kBytes per sec."
[fetest,INFO] Removed exclusive access mode from "/Equipment/Trigger/Statistics/kBytes per sec."
[fetest,INFO] Removed open record flag from "/Equipment/Periodic/Variables"
[fetest,INFO] Removed exclusive access mode from "/Equipment/Periodic/Variables"
[fetest,INFO] Removed open record flag from "/Equipment/Scaler/Variables"
[fetest,INFO] Removed exclusive access mode from "/Equipment/Scaler/Variables"
[fetest,INFO] Corrected 12 ODB entries
[fetest,INFO] Deleted entry '/System/Clients/20257' for client 'mhttpd' because it is not connected to ODB
OK
Init hardware...frontend_init!
Event size set to 10240 bytes
Ring buffer wait sleep 1 ms
OK
time 1564130782, data 91.354546
time 1564130783, data 93.358040
time 1564130784, data 95.105652
time 1564130785, data 96.592583
time 1564130786, data 97.814758
time 1564130787, data 98.768837
time 1564130788, data 99.452187
time 1564130789, data 99.862953
time 1564130790, data 100.000000
time 1564130791, data 99.862953
Warning: bank RND4 has zero size
time 1564130792, data 99.452187
time 1564130793, data 98.768837
time 1564130794, data 97.814758
time 1564130795, data 96.592583
Received break. Aborting...
frontend_exit!
Frontend shut down.
[lm17773@it038146 bin]$ 
=================================================================================



> > Hi,
> > 
> > We've been trying to run Fetest in the attempt of plotting the sine wave data on
> > the history page on the web server. However each time we've tried running a new
> > plot we have come across the error of 'no data' from the variables. In the
> > status page we are clearly obtaining data from the frontend and it is updating
> > the variable as expected in SLOW.
> > 
> > When setting up MIDAS we managed to produce a history plot from Fetest but are
> > unable to do so any longer. We did have a go at modifying the Fetest code but
> > created a backup before doing so and are now running the original backup.
> > 
> > What could be causing the Fetest data not to be showing in the history plot?
> 
> Is the logger running? (this application is handling the history data).
> If yes: Did you change the variable names? If yes: restart the logger.