FORMULA’s are known to crash. In the below Rick had some tips. I would think you could write a UTILITY template to list all FORMULAs.
Sort the APP by module and look at the module/procedure that comes after the last successful one in the exported TXA. Examine that procedure for anything odd. Formulas are notoriously unstable exporting to TXA. I highly recommend getting rid of any Formulas in your APPs.
Another idea. Selectively export one module at a time to figure out which one is causing the crash. Then examine it for oddities.