STL question

I am modeling an object and when saving the STL. When exporting an object there appears to be content missing. For example I save a version of a screw and the file is 200k. This slices and prints perfectly. Then I make a minor change such as adding a new screw driver slot and the new saved version is 600k and slices but does not print. Any clue.

Hello, try exporting the STL file using the STL export “Custom” setting and then try reducing the tolerance

Sorry I stated this n reverse. The simple file is 600k. Then I add detail and the file size is smaller and won’t slice. I will try the custom export though.