Error while building

[Atif Shahzad]

i am getting following error while building my project. there is no error showing in any file.

13:19:05 **** Incremental Build of configuration debug for project 18_9_tdma ****

make MODE=debug all 

Creating executable: out/gcc-debug//18_9_tdma.exe

D:/omnetpp-5.1.1/tools/win64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/6.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -loppqtenvd

collect2.exe: error: ld returned 1 exit status

make: *** [Makefile:88: out/gcc-debug//18_9_tdma.exe] Error 1

13:19:07 Build Finished (took 2s.217ms)