SharePoint Online has a hard limit on how many records can be queried in a list. If that limit is reached, the following error will be returned:

The attempted operation is prohibited because it exceeds the list view threshold enforced by the administrator.

The Create Document Reference step in workflow only allows user to specify Filters to retrieve documents, but not Input Properties. This becomes a problem when user tries to retrieve a document from a particular folder

When using Input Properties to specify a Folder path, a property called "FolderServerRelativeURL" is sent by K2 to SharePoint. This allows SharePoint to look for the document in a particular folder in the library.

But when using Filters, even if you specify a Folder path, the "FolderServerRelativeURL" will not be filled. Instead the filters are converted into CAML query used by SharePoint to query for the library. This means SharePoint will have to potentially search through all the items in the library to find the document, increasing the chances of hitting the list view threshold.

This can be avoided with Input Properties, but the Create Document Reference step does not provide the option to use Input Properties. Please do provide an option to for users to use the Input Properties in the Create Document Reference step.