Too many factors. Always try with the Default Quickstart config first (A500 or A1200). If you change emulation settings, you must know what they affect. If you select a different KS/WB config, you must set up your Workbench correctly according to how the real machine should be set up for things to work.
Tempted to move this to Support.WinUAE, but I will wait and see where this goes. Maybe it's a (non-native) C/C++ problem.
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