MapGenTest
MapGenTest is a standalone program that can be used to test floor generators made in PMDO's editor. It has stress test capabilities that can help you find those elusive 1/8192 erroring floors.
It can be found in the PMDC repo, under MapGenTest https://github.com/PMDCollab/PMDC/tree/master/MapGenTest
In order for it to work properly, it must be run with the -asset command line argument, followed by the path to the folder containing PMDO's Content and Data folders. This typically means the folder named "PMDO" for a regular installation. This path MUST be a relative path, and you must be sure to include the trailing slash to signify it as a folder. The launchsettings.json for MapGenTest in the repo has it point to the DumpAsset folder of the parent PMDODump project.
As a debug tool, expect things to break if these instructions are not followed perfectly.
