Issue with Unicode (not sure though)

Dear all,

We have just upgraded from 4.7 to ECC 6.0 and there seems to be a critical issue with one of our interfaces.

The field names of the import parameters of a Function Module are actually defined as numbers and it was working all the while.

But today, it gives an error You cannot use numeric literals as field names.

Is it related to unicode? Please help me out on this!

Thanks,

Vijay