Factorio Forums

I tried to update to the new version and received the following error message:

Update failed: Checking update packages failed:
Error opening update package: File D:/Games/Factorio 0.17/data/base/migrations/2018-12-21_Factorio_0.17.0.json not found

I have similiar issue. When downloading update it print error message

file_size(p): unknown error: The system cannot find the path specified. C:\Users\My Name\Desktop\factorio_0.17\temp\instructions.json

It seem the problem is space or non ASCII character. As My name contain š. Moving it to different location so path doesn't contain space solved this problem for me and update is working for me.

Thanks for the report, this should have been fixed in 0.17.22:

changelog wrote: - Fixed in-game updater would not work on Windows if Factorio path or write data path would contain non-ASCII characters. (68516)