codePost doesn’t support running files that contain null characters (\0 ). This includes:

  • binary file types, such as .class  or .o  files

  • some application file types (.xlsx )

Instead of uploading compiled files (e.g. .class ), you can upload the file's source code and use your environment's run script to compile them. For example, instead of uploading Helper.class , upload Helper.java  and compile it. 

If you'd like to work with an application file type that isn't supported, let us know!

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