How do I debug a 64bit Windows App?

I cant run it in 32bit to test it as the problem only occurs when I run it in 64bit (it seems to be a >3GB allocation issue), so how can I debug my app?

wait for a 64bits version of the debugger for windows
or
do a lot of systemlogs to track your problem.

Windows 64bit has only been out for 12 years now.

:[

Thanks Jean-Yves

Than it’s only a half-grown child :wink:

Xojo 64 bit builds are only one year old or so. Windows 64 bit debug should be here this year.