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You can make QWAST run faster by saving the RTC-Tools cache files in the FEWS config. These are: ...\Modules\QWAST_RTC22_RijnVast\model\AllocateWater.pymoca_cache and ...\Modules\QWAST_RTC22_RijnVast\src\__pycache__\. By copying these to the ModuleDataSet files, they are not generated at each run and thus it will be faster (...\Config\ModuleDataSetFiles\QWAST_RTC22_RijnVast.zip\QWAST_RTC22_RijnVast\). Important: it only works if the cache files are generated by the very same computer that the calculations are done. Thus if you have a FEWS system with moreFSS, then each FSS should have their own cache files.
Why is the QWAST run failing when I only want to calculate one year?
QWAST starts the year at 01.11. and ends it in the following year 01.11. It means that to calculate 1911 you need data from 1911.01.11. until (including) 1912.01.11. This data is often in the zip belonging to the next year.