Hello, thanks for the reply, but the entire code is too big to be pasted, thats y i have pasted the code which i think can be useful , nevertheless if u wish i can put the entire code.

also i figured that the problem lies in my data structures , the way i take the references ( since i am new to perl mostly i have coded in c and assembly so maybe it will take some time to get used to this).

basically for each of my members in target list i have to run all the elements of rulesfile referenced i.e.

for eg: 
rulesfile: [*rulesid_02,*rulesid_01]
target_list: [*runid_01,* runid_04]
[download]

so here runid_01 should run with rulesid_02 as well as rulesid_01 , similarly runid_04 should run with rulesid_02 as well as rulesid_01

where rulesfile pointing to respective fields is 

rules_file: 
- rules_file_id: &rulesid_02
   name: tpsm_rulesfile_BE        
   hostname: 

- rules_file_id: &rulesid_03
   name: test3        
   hostname: 

- rules_file_id: &rulesid_04
   name: test4        
   hostname: 

and target_list referes to :

run_target_platforms: 

- run_target_id: &runid_01
   target_controls:
     run_target_type: simulator    #simulator, emulator , hardware
     run_target_active: yes
   target_connection_info: 
     run_target_hostname: 

- run_target_id: &runid_02
   target_controls:
     run_target_type: hardware    #simulator, emulator , hardware
     run_target_active: yes
   target_connection_info: 
     run_target_hostname: NA
[download]

I hope you see the rpoblem lies in my taking these data structures. i have deleted some fields to avoid complication