Question

I am trying to use the file:open(….) function in erlang but it doesn’t seem to work. I keep getting an {error, eio} exception.

Ive looked into it in the erlang documentation and all i have found is that it is the posix error for input/output… go figure.

The file name im outputting in is in the formation of “C:/directory/file.txt”
Im not sure if this has something to do with it.

Is there anyway i can make erlang give me a more specific explanation to what is wrong?

Thanks,
Jack

Answer 1

Unfortunately I do not know of a way to find out more without peeking inside the Erlang/VM.

If you look in the windows erlang source code there are a bunch of different errors which could cause en eio error. You can find a list of them here. In order to figure out which specific one it is, I would attach with windbg and step through the code as instrumenting and recompiling it on windows is a pain.

You might also be able to use something like Process Monitor to find out which system calls are being made and what they return.