[ns] Error in executing infra.tcl file

[qute rose]

I have included the following code in infra.tcl file
set nf [open out.nam w]
$nf namtrace-all $nf

I also made necessary changes in the stop(Finish) procedure

but when i run the simulation, i got the eeor message. Plz check the attached 
screenshot for the error message. Anyone plz tell me the reason for this error 
and also how to fix this error. 



  

[ns] Error in executing infra.tcl file

[qute rose]

I have included the following code in infra.tcl file
set nf [open out.nam w]
$nf namtrace-all $nf

I also made necessary changes in the stop(Finish) procedure

but when i run the simulation, i got the eeor message. Plz check the attached 
screenshot for the error message. Anyone plz tell me the reason for this error 
and also how to fix this error.