@solana/kit · Program clients
Solana error #8500001
PROGRAM_CLIENTS__UNRECOGNIZED_INSTRUCTION_TYPE
Appears as Solana error #8500001; Decode this error by running `npx @solana/errors decode -- 8500001 '…'`
Message
Unrecognized instruction type '$instructionType' for the $programName program.
Placeholders (instructionType, programName) are filled from the error’s context. Paste the base64 argument below to see the real values.
What it means
Generated program clients: unknown instruction or account discriminators, wrong program address.
What to do
- Make sure the client matches the deployed program version and that you are calling the right program address.
Decode it locally instead
npx @solana/errors decode -- 8500001 '<base64 context>'
In development, import from @solana/kit as usual and the full message is thrown. In production the message is stripped to keep bundles small; the error object still carries error.context with the same values this page decodes, and isSolanaError(err, SOLANA_ERROR__PROGRAM_CLIENTS__UNRECOGNIZED_INSTRUCTION_TYPE) lets you branch on it.