Reading a file in the IFS

Hi folks
We are on V7r3
With the help of this group, I am using the
'_C_IFS_fopen'
'_C_IFS_fgets'
'_C_IFS_fclose'

For about a year now, and once I was told of what I was doing wrong, with no problems
Until now
I am using these functions for a new set of ifs files, and am receiving
C_ERRNO = 3490 which translates to an error string of 'Conversion error.'
On the _C_IFS_fopen finction

I believe it MAY be the ccsid of the ifs files that I am attempting to open - CCSID = 1208
Everything I have used these functions on up until now have been CCSID = 819 without incurring this problem'
I have tried to googel the answer to this but having little success
Is there anywhere in the function parameters that I can change the CCSID on the _C_IFS_fopen function?
If anyone can point me to where the write up to these functions can be found will be greatly appreiated

Alan Shore
Solutions Architect
IT Supply Chain Execution

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