This error indicates that the decoder was unable to locate a user-defined
type (struct, enum, or contract type) via its ID. Unfortunately, we can't
always avoid this at the moment; we're hoping to make this more robust in
the future with Truffle DB. In the meantime, it is at least worth noting that
you should not encounter this error if your entire project was written in
Solidity and all compiled at once. Sorry.
This error indicates that the decoder was unable to locate a user-defined type (struct, enum, or contract type) via its ID. Unfortunately, we can't always avoid this at the moment; we're hoping to make this more robust in the future with Truffle DB. In the meantime, it is at least worth noting that you should not encounter this error if your entire project was written in Solidity and all compiled at once. Sorry.