Delete documents only deletes SOME documents

Hi All,

The client wants to delete all documents of a certain document type XX.

This can be performed in Other Functions --> Delete --> Documents

However, after selecting the version, period, year and document type XX as required,

Only SOME of the the documents are deleted!

NB None of the cons units or tasks are locked, nor is the period closed.

Does anyone have any ideas;

1. Why won't ALL the documents delete?

2. How can I delete the rest?

NB I realise it's not best practice but this system is not yet live and this is the quickest way for the client to progress with their activities (they don't want to deleteall data nor reverse all of doc type XX).