Echidna fuzzing question for interesting problem faced

[bbresearcher]

Hi All,
Please can I ask if anyone has run into this situation before? (I did need to comment out two methods that caused an error 'NoneType' object has no attribute 'parameters' but after that the compile works fine).
Project was originally a hardhat that I converted to use Foundry, I wrote a foundry test just to be sure it compiles and deploys and that is all fine.

• If I run
  echidna . --contract myContract --config echidna.yaml --format text --workers 16 --test-limit 1000000
  I get this error

CallStack (from HasCallStack):
  error, called at src/EVM/Types.hs:1382:19 in hevm-0.54.2-D5k1vjnVtDSLAeE9TSOatN:EVM.Types
  internalError, called at src/EVM/Solidity.hs:406:22 in hevm-0.54.2-D5k1vjnVtDSLAeE9TSOatN:EVM.Solidity

• So after some searching I found a way to check would be to first run

crytic-compile .

and that works fine.

• Next you can test by running

slither . --print echidna

This also works fine

Is there any other way I can check why I am getting this error? (I also tried running the docker image rather than my local install to be sure it was not environmental but the docker image does not have foundry installed and if you install foundry it needs git).