error while Linking c++ and ns2?

Question

had done following steps Download "ex-linkage.cc" file, and save it under the "ns-2" directory. Open "Makefile", add "ex-linkage.o" at the end of object file list.

Re-compile NS using the "make" command. Download the "ex-linkage.tcl" file

that contains "MyAgent" testing OTcl commands.

Run the OTcl script using command "ns ex-linkage.tcl".

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i am getting following error

$ ./ns ex-linkage.tcl
invalid command name "Agent/MyAgentOtcl" 
    while executing 
"Agent/MyAgentOtcl create o3 " 
    invoked from within 
"catch "$className create $o $args" msg" 
    invoked from within 
"if [catch "$className create $o $args" msg] { 
if [string match "__FAILED_SHADOW_OBJECT" $msg] { 
delete $o 
return "" 
} 
global errorInfo 
error "class $..." 
    (procedure "new" line 3) 
    invoked from within 
"new Agent/MyAgentOtcl" 
    invoked from within 
"set myagent [new Agent/MyAgentOtcl]" 
    (file "ex-linkage.tcl" line 8

Answer 1

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»» invalid command name "Agent/MyAgentOtcl" «« : Looks like you are using an executable 'ns' with no "Linkage".

tar xvf ns-allinone-2.35_gcc482.tar.gz

https://drive.google.com/file/d/0B7S255p3kFXNSGJCZ2YzUGJDVk0/view?usp=sharing

cd ns-allinone-2.35/
patch -p0 < linkage_ns235.patch

https://drive.google.com/file/d/0B7S255p3kFXNYmZ0SWFQaUNhWTA/view?usp=sharing

./install
cd ns-2.35/
sudo make install
cp ns ns235-linkage
sudo cp ns235-linkage /usr/local/bin/

Simulation : ns235-linkage ex-linkage.tcl
.
warning: no class variable Agent/MyAgentOtcl::my_var2_otcl
.
Message From MyPrivFunc
     my_var1 = 2
     my_var2 = 3.140000

Using the "ns235-linkage" command makes sure you are using the right 'ns'. P.S. : You are not recompiling with 'make', but with 'make clean && make'. Or by running './install' in the top directory ns-allinone-2.35/.

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ns2linkage-ns2