First, does the error message reference Program files (x86) in the file path? If it does, follow these steps:
If you do not have reference to the Program files (x86) folder in the file path referenced in the error, rename your %AppData%Roaming\OCLC\Connex\options.xml file to .old and retry your batch export.
You may need to re-add some of your Tools > Options settings after renaming the Options.xml file.