Hi Andrew, I think you might have meant to copy a longer key name? My windows 8.1 PC does not have any key called HKEY_LOCALMACHINE, only HKEY_LOCAL_MACHINE.

I am running the module I'm testing with on the same PC as I am running the report designer from. AR's preview of the same report file has the default number of parameter suggested values (1000) while the report designer respects my registry edit (up to 10,000).

I have added MaxRowSetRecords values in the following places:

HKEY_LOCAL_MACHINE\SOFTWARE\SAP BusinessObjects\Suite XI 4.0\Crystal Reports\DatabaseOptions\LOV
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SAP BusinessObjects\Suite XI 4.0\Crystal Reports\DatabaseOptions\LOV

The Wow6432Node one is what made the difference for the report designer.