specifying the path for file in system specifc

Dear all,

I have a problem as

for two reports A& B the input file is getting generated from C and D.based on that file the A& B should be executed.

the problem is how to specify the path for file in three systems(develop,testing,production) respective to the system ID.

can I specify as

Constant: XYZ(20) value '/transfer/sy-sysid/saldenb'.