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File operations of stdio library render program berserk !

I just had a requirement to run a project while using File operations in it. So i added the much revered "stdio" library. But after i call any of the File operation functions e.g, fopen or fclose, it renders the program flow berserk. I cannot figure out the problem because, of this file operation.

I'm testing the code on RAM of C28335 with,

.cio section mapped on ---> RAML7   & size 1kB.

.esysmem mapped on -----> RAMM1  & size 4kB.

heap size   --->  4kB.

stack size   ----> 1kB.


I'm running the program on ezDsp 28335 CCS v3.3, and please reply to the query if any of you had the same problem. And if to solve the matter you need any further information, kindly query me, it'll be very nice of you.