Hi,
in Cognos 8 we used the trigger.bat file to kick off cubes generations and reports. We recently migrated to COgnos 10.1 FP1 but i can not find this file in the Cognos 10 installation directory? 
does anyone know if this file still exists?
It’s still there. See the following link from the Admin and Security guide.
It may reside in a different location/install if you did not install a single server setup(CM, App, and GW on same server and same dir). I could be wrong but last I recall this was part of the gateway component. If it isn’t there check your other installs.
Did you ever find a solution to this, ran into the same problem when upgrading from Cognos Express 9.5 to 10.1
For whatever reason (licensing maybe) a few things were removed from the express install but accidentally left in the doco. Trigger was left out and so was a handy TI command line execution tool.
If you copy these from a C8 install they will probably still work although there may be licencing issues. I got TIExecute to work against Cognos Express 10.1 and now I’ll start on getting trigger to work.
If you can find the C8 source files you might find this works: