Conditional watch point in Eclipse ABAP

I am new to SAP world. i am getting familiar to abap in eclipse.

Now when i set conditional watch point during debugging,my program is getting terminated. i don't why this is happening.

but when i use watch-point without condition is working fine.

Error Description.

Category                           Internal Kernel Error

Runtime Errors                  RUNT_ILLEGAL_SWITCH

Application Component    BC-ABA-LA

Error Message                   Internal error: Unexpected status in ABAP/4 runtime environment.

Can anyone provide me some help regrading this issue  ?

Thanks in advance.