# Q&A

Q&As are loosely broken into two categories, chain services (venus shared modules) and independent modules.

# chain services (venus shared modules)

**1)、**From venus node, ERROR: must set url or token, or

2021-09-08T11:05:33.796+0800 WARN cliutil apiinfo/apiinfo.go:125 parse libp2p address error , plz confirm this error failed to parse multiaddr "": empty multiaddr

Please check if urls/tokens are configured properly. Urls are requried to follow formats defined in multiaddr (opens new window). Example: --node-url=/ip4/127.0.0.1/tcp/3453, don't do: --node-url= /ip4/127.0.0.1/tcp/3453.

**2)、**When connecting to venus from some shared modules, connect to node failed cannot dialer to addr ws://192.168.10.73:3453/rpc/v0 due to unexpected EOF

venus probably hasn't been configured to allow connection from other IP address. Example: 0.0.0.0:3453, don't do: 198.172.0.3:3453.

**3)、**From venus, too many files open* (opens new window)

Set the limit for number of open files to a larger number. $ ulimit -n 1048576

**4)、**From venus-messager or venus * (opens new window)

ERROR[2021-09-14T01:30:03-04:00] listen head changes errored: process new head error: process apply failed got parent receipt failed amt load: failed to root: blockstore: block not found: amt load: failed to root: blockstore: block not found

Synchronization issues. Check if venus is properly synced to latest height.

**5)、**From venus-messager, WARN[2021-09-14T01:54:21-04:00] no broadcast node config * (opens new window) This warning can be ignored.

**6)、**From venus-miner, ERROR miner miner/baseinfo.go:355 [t01011] failed to compute winning post proof: no connections for this miner t01011

The venus-sealer for the miner id mentioned in the error is not properly connected to venus-gateway.

**7)、**From venus-miner, ERROR miner miner/multiminer.go:168 create WinningPoStProver failed for [<empty>], err: getting sector size: not found resolve address * (opens new window)

Nertowrk doesn't support the sector size user specified during init. Check network.filecoin.io (opens new window) for latest network configurations.

**8)、**From venus-messager, ERROR[2021-09-14T08:54:29-04:00] listen head changes errored: RPC error (-32601): method 'Filecoin.ChainNotify' not supported in this mode (no out channel support) * (opens new window)

Choose either ws or wss as network protocol in url for use between shared modules. Urls are requried to follow formats defined in multiaddr (opens new window).

**9)、**From venus or venus-messager, bad handshake * (opens new window)

Check IP, ports, and token in venus-messager config file are properly configured. Urls are requried to follow formats defined in multiaddr (opens new window).

**10)、**From venus, Proof type 7 not allowed for new miner actors * (opens new window)

During sealer init, user chose wrong sector size for the network. Check network.filecoin.io (opens new window) for latest network configurations.

**11)、**When sending a message, Address txxxxxxx not exit * (opens new window)

Check if there is wallet addresses registered on gateway. Also see if connection between venus-messager and Venus-gateway is okay.

# venus independent modules

TBC