Hello Sumit,
can you try also with version 8.5.0.2, 8.5.0.3, 8.5.04?
I ask that, because between V8.5.0.1 and 8.5.0.2 there is a huge change concerning the code pages.
Meaning that if you have the same problem with 8.5.0.2+, then the problem is not CMOD but yours, since you didn't follow the upgrade path between 8.5.0.1 -> 8.5.0.2+.
Hint, read the README, and add the ARS_ORIGINAL_CODEPAGE settings after the launch of "arsdb -I <instance> -u" will tell you which value to use.
Sincerely yours,
Alessandro