FMV1328W

An error occurred generating delta file for 'file-name'. The  return code is retcode.
Explanation
 An error occurred that prevented the creation
of the delta file. Possible reasons for this error include:  The base file cannot be opened for reading
The file being backed up cannot be opened for reading
The delta file cannot be opened for writing
The file being backed up has grown to a size larger than 2 GB
A memory file mapping of the file cannot be created

System action
 A full backup of the file is made, and a new
version of the reference file is stored in the subfile cache.

User response
 If the message indicates return code 4504, check
the delta subfile cache directory for any residual delta files. The
delta subfile cache directory is specified by the client option SUBFILECACHEPATH.
Search the directory for files named \".dXXXXXXXX\" where \"XXXXXXXX"\
is an eight-digit number. If there are no backup operations in progress,
there should not be any files in the SUBFILECACHEPATH with this name.
If there are no backup operations in progress and these files exist,
they can safely be removed. If you continue to receive this message
but there are no residual delta files in the subfile cache directory
and the file has not grown to a size larger  than 2 GB, then contact IBM® technical support for further
assistance.