Error Reference Hub
NV4005Runtime
File I/O Error
A runtime standard library filesystem operation failed during read, write, or creation.
Why this error occurs
Insufficient permissions, full disk, locked file descriptor, or non-existent parent directory when writing.
Incorrect Code
import std.fs
fs.write("/root/readonly_dir/output.txt", "data")Corrected Code
import std.fs
let path = "./output.txt"
if fs.exists("./"):
fs.write(path, "data")Troubleshooting & Remediation
- 1Verify directory write permissions.
- 2Use 'fs.exists(path)' before attempting file read/write operations.
- 3Check available disk space.
Relevant CLI Commands
$ nextviper run <file.nv>