Hi, Man page zshmodules(5.8) seems to be missing status information in module zsh/system for builtins sysopen and sysseek. All the other builtins have some kind of statement for return status. I believe status 0 is success and 1 would be an error of some kind for both. Don't know if there are other error numbers or if the parameter ERRNO is used. Should it be assumed 0 and 1 are the only status numbers if nothing is stated? Thanks, Jim Murphy