# NetLink Exporting Images doesn't work (Unknown string escape)

Exporting Image files (intermittently) doesn't work:

I get messages back indicating the error is to do with escaping characters:

Syntax::stresc: Unknown string escape \\U.


I am answering my own question to help out other .Net/Mathematica developers in the future.

I am using random file names (DTWERG, ERYFGJ, IYIGGD) and it turns out when Mathematica exports an image file that has a slash and followed by : b, t, n, f, r it recognises/honors the escape slash.

For example when a file name starts with an r as per the screenshots, it treats the \r as a newline, a CRLF!

Using forward slashes rather than backslashes resolved the problem:

• This applies to Windows-based filenames in standard Mathematica functions like SetDirectory. Hit that one today myself. – Verbeia Apr 4 '13 at 8:14
• To be precise, \r is CR. LF is \n. Another way to deal with it is to escape the backslashes. – Oleksandr R. Jul 14 '13 at 13:11

Put double slashes instead of single slashes:

Not:

C:\Users\Blabla

Rather:

C:\\Users\\Blabla