Pingpong testing in sandbox

AlgoSDK
1

Using Algorand Sandbox, config.dev file configuration as below:

export ALGOD_CHANNEL=""
export ALGOD_URL="https://github.com/algorand/go-algorand"
export ALGOD_BRANCH="master"
export ALGOD_SHA=""
export NETWORK=""
export NETWORK_TEMPLATE="images/algod/DevModeNetwork.json"
export NETWORK_BOOTSTRAP_URL=""
export NETWORK_GENESIS_FILE=""
export NETWORK_NUM_ROUNDS=30000
export INDEXER_URL="https://github.com/algorand/indexer"
export INDEXER_BRANCH="master"
export INDEXER_SHA=""
export INDEXER_DISABLED=""

When all the services started and I execute pingpong run, the following error message occurs:

error sending Transaction, sleeping .5 seconds: HTTP 400 Bad Request: TransactionPool.Remember: txn dead: round 442 outside of 436–441

Does anyone know how to solve this?

2

Welcome to Algorand!

Where did you get the pingpong program?

This error usually indicates that the validity window of the transaction is incorrect.
See first/last valid round: Structure - Algorand Developer Portal