[help needed] how to debug application which uses comScript?

[retsyo]

I try to translate my work-able python+win32com code into nim+winim. However I get the following message. So what is the feasible way to debug a nim+winim code? I have tried to add some echo, but not all the value can be treated by $, and I really think a debugger tools will save a lot of time.

Thanks

E:\my_project\main_cui.nim(223) main_cui
E:\my_project\main_cui.nim(121) fnFillExcel
C:\Users\USER\.nimble\pkgs\winim-3.4.0\winim\com.nim(1035) get
C:\Users\USER\.nimble\pkgs\winim-3.4.0\winim\com.nim(988) invoke
E:\msys64\home\USER\_nim\nim\lib\system\fatal.nim(49) sysFatal
Error: unhandled exception: index 1 not in 0 .. 0 [IndexDefect]
Error: execution of an external program failed: 'E:\my_project\main_cui.exe '