800xA 6.0.3.1 FSD Error after IP changes

Good day,

A customer has changed the client server and control network ip ranges of the 800xA control system (version 6.0.3.1) and the difference report functionality has since broken.

While downloading control builder changes, an error popup appears indicating its unable to write differencereport.dtd.

When checking control builder session log, the error is originating when saving the file to the file set distribution service.

Using fsdtool, its noted that the file is being written but something else is causing it to crash and not finish.

This results in the difference report not picking up any changes (when there actually are) and not uploading the new files to the FSD for the opc servers, which then all go red as they are no longer up to date. We have to manually distribute the files to get the opc running again.

Downloading from any engineering station works as expected but only when downloading from a connectivity server do we get the error.
Attached is the engineering station and connectivity server session logs.

Any suggestions?