I Migrated DynaTrace from 6.3 to 6.5 till then the collector .ini file had parameters but as applied the new 184.108.40.2063 fixpack in which the issue of resolving :
But the .ini file was empty. This has happened the 2 time in row
Also one thing is quite interesting that it doesn't happen in all collectors only in one or two,
We have also encountered with such issue after upgrading AppMon to 6.5 recently but in my case I'm able to solve it by replacing the .ini file from collector which is working fine. (You might have solve it already :))
I think there is some BUG in this version.