Error using SO_OBJECT_DOWNLOAD to download attachments

Question

I am using the SO_OBECJT_DOWNLOAD function to download the attachments to a shared folder. The program works when I run it directly. But after I scheduled it as a background job, the program failed. Here is the description of the error:
An exception occurred that is explained in detail below.
The exception, which is assigned to class 'CX_SY_CODEPAGE_CONVERTER_INIT', was
not caught in
procedure "SO_OBJECT_DOWNLOAD" "(FUNCTION)", nor was it propagated by a RAISING
clause.
Since the caller of the procedure could not have anticipated that the
exception would occur, the current program is terminated.
The reason for the exception is:
Possibly, one of the codepages '4103' or '0000' - needed for the
conversion - is unknown to the system. Another option is, that a Unicode
codepage was specified for a file in LEGACY MODE, which is not allowed.
Additional parameters for the codepage conversion (as , for example, the
replacement character) might have invalid values. You can find further
information under 'Inernal notes'.

Answer 1

The attachments are downloaded to a shared folder on a file server. I got codepage convet error when the program trying to read the file, which means the error happens before the file is downloaded.