> I am pretty sure I read that 4DWrite Pro requires the 64-bit version, but I > can't find that reference now ...
Actually the opposite is true; the legacy 4D Write only works in 4D 32 bit, while 4D Write Pro works in both 4D 32 bit and 4D 64 bit. > Is it just that you can have a bigger cache with 64 ? This is a big one, but it's not just the cache, it's the overall application memory (which includes cache and everything else, such as blobs in memory for example). With 32 bit you are limited to 2^32 bytes or 4 Gigabytes of application memory, while in 64 bit you are limited by your hardware (the theoretical limit is 2^64 or 16 Exabytes). Another reason people would be interested in 64 bit would be the new preemptive multiprocessing of 4D v16: http://doc.4d.com/4Dv16/4D/16/Preemptive-4D-processes.300-3036340.en.html > Should one compile with 32 bit or 64 Bit version ? If you are talking about compiling a component or structure then I suggest you turn on the option to compile for both (multi-target compilation) so your structure/component works for both 32 bit and 64 bit. If you are talking about building a merged application then remember that on Windows the 64 bit edition of 4D Developer Edition and 4D Volume Desktop is currently in Preview and should only be used for development. They will be made final in upcoming R-Releases: http://forums.4d.fr/Post/EN/18904187/1/18904188#18904188 http://download.4d.com/Documents/Products_Documentation/LastVersions/Line_16/VIntl/4D_v16_0_ReleaseNotes.pdf The following document about changing from 32 bit to 64 bit may also be helpful: http://livedoc.4d.com/4Dv16/help/Title/en/page8826.html ==== Benefit from 64-bit features See the differences In particular: * The 64-bit architecture pushes back database cache limits. Improve your database's performances simply by using a larger cache. Adopt powerful 64-bit features such as preemptive processes, animated form objects, or new printing features. Build your applications with 4D Runtime Volume License 64-bit.. Use final 64-bit versions of 4D Server on Win and Mac OS - refer to the Using 4D Server 64-bit version (OS X) and Using 4D Server 64-bit version (Windows) sections * New Quick report editor, compatible with reports created using previous versions. See Label editor (64-bit). * New Label editor, compatible with label files created using previous versions. See Quick reports (64-bit). * Create graphs using an Object type parameter with the GRAPH command. ==== -Tim ********************************************************************** 4D Internet Users Group (4D iNUG) FAQ: http://lists.4d.com/faqnug.html Archive: http://lists.4d.com/archives.html Options: http://lists.4d.com/mailman/options/4d_tech Unsub: mailto:[email protected] **********************************************************************
