I am following this doc: https://developers.eos.io/eosio-home/docs/your-first-contract.

This is the hello.cpp contract code which is successfully deployed:

#include <eosiolib/eosio.hpp>
#include <eosiolib/print.hpp>
using namespace eosio;

class hello : public contract {
      using contract::contract;

      void testit() {
         print( "Hello, ");
EOSIO_DISPATCH( hello, (testit))

When I call cleos push action hello testit '[]' -p hello@active, this error is shown on the console:

!action_type.empty(): Unknown action testit in contract hello

1 Answer 1


Apparently, as shown in this issue https://github.com/EOSIO/eosio.cdt/issues/214, the generation of the abi is not correct, and sometimes - always in my case - the .abi file is empty.

The solution that you can use now is literally writing your own .abi file. Luckly, I had an old version of the same contract compiled with the old eosiocpp, and the .abi was exactly what I needed. So, I just used that, and everything worked.

  • What version of eosio.cdt do you use? The latest version (1.6.1) uses different ABI generation process, so many empty ABI cases are resolved. If you use previous version, I recommend upgrading it.
    – conr2d
    Commented Apr 14, 2019 at 12:45

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