Well, on the last 7 KUKA KRC2 robots i have installed, the pfbms.ini contains
DATABASE_PATH=init/
And it works fine. But it's not important...
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You need to type this file no matter if you use it as master or slave.
If you use it as a master or master/slave you will type the database you have created your own.
If you use it only as a slave you need to put the empty database (slave.ldb)
This is also according to the manual and KUKA. (and I have done this 3 times my self)You type the slave.ldb under the master section
pfbms.ini :
[MASTER]
MASTER_USED=0
DATABASE_PATH=init/slave.ldb
FIRMWARE_PATH_A1=drivers/FW_5613.bin
FIRMWARE_PATH_A2=drivers/FW5613A2.bin
WATCHDOG_TIME=3
MAPPING_USED=0
MAPPING_PATH=init/
;DEACTIVATED_SLAVES=