Dan, thank you for that info! I guess a little more background information would be helpful.
To help press loads and bindery/finishing, the sheet stacks were capped at 2000 sheets which is where the output to 4000 records(2up 2k records) was needed. To help the workflow of prepress, we have merged multiple processed lists into one master list—each group in the list is mailed out separately so they need to stay in separate files regardless of record count. That separation is where the OpenNewOutputFile helps keeps everything separate and named accordingly.
I don't believe we've ever needed to have this type of chunking before—either the amount of records wasn't large enough to warrant chucking by record count or there was only one version to output. So, I wasn't sure if there was an easy way to accomplish this task
Unless I'm missing something here, I think our issue if we turned off "Output to multiple files" is the amount of records for one chunk would be too much in a single file(60k+ records). And having the imposition file as cut and stack would get the records out of order when trimming sheets or splitting the files after composition.
Was hoping there was another way of setting up my rules to use the dynamic chunking in a more efficient way that could use the same naming convention and keep files grouped together.
Apologies if that explanation wasn't clear!