SOLVED SEE COMMENT BELOW

Ok, this one is tricky:

I call this command from Java with `Process.exec()`:

```
grep -ne 'xxx\|yyy' file

```

and it only returns `xxx`?

Edit: I escape the `\` with `\\` in java.

But when I call the exact same command from the commandline on the same machine it returns both `xxx` and `yyy` as expected!?

I have tried everything, escaping more and less with `-E`, changing `'` to `"` (which actually oddly doesn't work when you run from java either)?!

Has someone run in to the exact same odd problem?