set PATTERNDIR=..\patterns\
set CMODEL= .\fcb.exe
FOR /R %PATTERNDIR% %%b IN (*.iq) DO (
  if exist %%b (
    %CMODEL% -i %%~dpnb.iq -o c_ref.out -p %%~dpnb.par 
    fc /b %%~dpnb.out c_ref.out >> cmp_c_ref.txt
  )  
)
Here %%b contains C:\Users\karthiks\Documents\2G\fcb\working\patterns\FCB_SPUR_original\TC_202\FCB _RA130_CO_900.iq I want to extract FCB_RA130_CO_900.iq
Can you please help me out