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installation problem



Hi,

   i was trying to install ns-2.1b5 using vc++ on a windows NT machine and
the installation stops by giveing the following error message:

tclAppInit.o : error LNK2001: unresolved external symbol "class
EmbeddedTcl  et_ns_ptypes" (?et_ns_ptypes@@3VEmbeddedTcl@@A)
pareto.o : error LNK2001: unresolved external symbol "public: virtual
class AppData * __thiscall Process::get_data(int &,class AppData const *)"
(?get_data@Process@@UAEPAVAppData@@AAHPBV2@@Z)
expoo.o : error LNK2001: unresolved external symbol "public: virtual class
AppData * __thiscall Process::get_data(int &,class AppData const *)"
(?get_data@Process@@UAEPAVAppData@@AAHPBV2@@Z)
cbr_traffic.o : error LNK2001: unresolved external symbol "public: virtual
class AppData * __thiscall Process::get_data(int &,class AppData const *)"
(?get_data@Process@@UAEPAVAppData@@AAHPBV2@@Z)
app.o : error LNK2001: unresolved external symbol "public: virtual class
AppData * __thiscall Process::get_data(int &,class AppData const *)"
(?get_data@Process@@UAEPAVAppData@@AAHPBV2@@Z)
telnet.o : error LNK2001: unresolved external symbol "public: virtual
class AppData * __thiscall Process::get_data(int &,class AppData const *)"
(?get_data@Process@@UAEPAVAppData@@AAHPBV2@@Z)
trafgen.o : error LNK2001: unresolved external symbol "public: virtual
class AppData * __thiscall Process::get_data(int &,class AppData const *)"
(?get_data@Process@@UAEPAVAppData@@AAHPBV2@@Z)
traffictrace.o : error LNK2001: unresolved external symbol "public:
virtual class AppData * __thiscall Process::get_data(int &,class AppData
const *)" (?get_data@Process@@UAEPAVAppData@@AAHPBV2@@Z)
pareto.o : error LNK2001: unresolved external symbol "public: virtual void
__thiscall Process::process_data(int,char *)"
(?process_data@Process@@UAEXHPAD@Z)
expoo.o : error LNK2001: unresolved external symbol "public: virtual void
__thiscall Process::process_data(int,char *)"
(?process_data@Process@@UAEXHPAD@Z)
cbr_traffic.o : error LNK2001: unresolved external symbol "public: virtual
void __thiscall Process::process_data(int,char *)"
(?process_data@Process@@UAEXHPAD@Z)
app.o : error LNK2001: unresolved external symbol "public: virtual void
__thiscall Process::process_data(int,char *)"
(?process_data@Process@@UAEXHPAD@Z)
telnet.o : error LNK2001: unresolved external symbol "public: virtual void
__thiscall Process::process_data(int,char *)"
(?process_data@Process@@UAEXHPAD@Z)
trafgen.o : error LNK2001: unresolved external symbol "public: virtual
void __thiscall Process::process_data(int,char *)"
(?process_data@Process@@UAEXHPAD@Z)
traffictrace.o : error LNK2001: unresolved external symbol "public:
virtual void __thiscall Process::process_data(int,char *)"
(?process_data@Process@@UAEXHPAD@Z)
app.o : error LNK2001: unresolved external symbol "protected: virtual int
__thiscall Process::command(int,char const * const *)"
(?command@Process@@MAEHHPBQBD@Z)
ns.exe : fatal error LNK1120: 4 unresolved externals


i guess this is a linking problem.

can anyone tell me why i am getting this error????


thanks in advance.

satish