The CommandBox Thin binary cannot be used by itself as it contains nothing inside of it but the Java bootstrap. It does not contain any of the other libraries, jars, or Lucee versions that CommandBox needs to load. it is only 300KB in size. The way that the 'thin" binary is to be used is to first download and run the normal CommandBox or CommandBox Light binary which will extract itself into the CommandBox Home. Once this has been completed, you can delete that box binary and replace it with the box-thin binary (renamed to box ). The new thin binary will take up less disk space and will simply use the existing CommandBox home that has been extracted.