Copy command called through FM SXPG_CALL_SYSTEM not performed properly

Hi Gurus,

I am calling the FM SXPG_CALL_SYSTEM with the command name as COPY maintained for windows NT server and I am passing the additional parameters with the file names ( source file <space> destination file). Source files can be picked using wild characters (for eg:filename_o_*.wrk) and all the files fetched from Source has to be placed into the one target file specified in the destination.

While performing this FM, we are getting error sometimes. suppose if there are two files present in the source, first part of first file and second part of second file is copied and not the whole file. So we are missing second part of first file and first part of second file. This happens randomly like once in a day. Can you please suggest how to rectify this error?

This is in High priority. Any immediate response is highly appreciated.

Please advice me the right forum for posting this if this is not the right forum.