Tong Wang writes: > I used insight debugger a while ago, and I remember I only need to open the .exe file, then the corresponding .c file > should show up, and I can go through my code to find the errors. But now when I open the .exe file , I saw something > strange as shown below. Did I miss some steps ? I am using Win XP + Cygwin . The compiling command I used is > quite naive: gcc -Wall -O2 mycode.c -o mycode . Thanks for any help. Look at _Debugging Options_ in the fine gcc manual. Andrew.