# # Lotus: node troubleshooting
This page offers some troubleshooting advice when storing data with Lotus by listing some of the most common errors that users can come accross.
Have you successfully overcome other Lotus-related problems when storing data? Please contribute to this page by editing it with the link at the bottom!
# Error: Failed to start deal
WARN main lotus/main.go:72 failed to start deal: computing commP failed: generating CommP: Piece must be at least 127 bytes
This error means that there is a minimum file size of 127 bytes.
# Error: 0kb file response during retrieval
This means that the file to be retrieved may have not yet been sealed and is thus, not retrievable yet.
Miners can check sealing progress with this command:
lotus-miner sectors list
When sealing is complete,
pSet: NO will become