# # Lotus: node troubleshooting
This page offers some troubleshooting advice for Lotus nodes by listing some of the most common errors that users can come accross.
Have you successfully overcome other Lotus Node-related problems? Please contribute to this page by editing it with the link at the bottom!
# Build errors
Please check the build logs closely. If you have a dirty state in your git branch make sure to do something like:
git checkout <desired_branch> git reset origin/<desired_branch> --hard make clean
(or directly delete and clone the repository again as shown in the installation instructions.
# Slow builds/start from China
See the tips when running in China guide.
# Error: initializing node error: cbor input had wrong number of fields
This happens when you are starting Lotus which has been compiled for one network, but it encounters data in the Lotus data folder which is for a different network, or for an older incompatible version.
Solution: follow the instructions for switching networks closely.
# Error: Failed to connect bootstrap peer
WARN peermgr peermgr/peermgr.go:131 failed to connect to bootstrap peer: failed to dial : all dials failed * [/ip4/188.8.131.52/tcp/1347] failed to negotiate security protocol: connected to wrong peer
Try running the build steps again and make sure that you have the latest code from GitHub.
# Error: other peer has different genesis!
ERROR hello hello/hello.go:81 other peer has different genesis!
# Error: repo is already locked
You already have another lotus daemon running. Stop it first (
lotus daemon stop).
# Config: Open files limit
Lotus will attempt to set up the file descriptor (FD) limit automatically. If that does not work, you can still configure your system to allow higher than the default values.
The specific instructions depend on your system and how you are running Lotus (with systemd or not etc). Please use a search engine to find instructions as there are plenty of very good guides.
# Error: Routing: not found
WARN main lotus/main.go:72 routing: not found
This error means that the miner you are trying to talk to is offline.