I have use this in ibasic and it works fine
openfile(myfile,"c:\basic-file\" + fileband$ + ".txt", "W")
Is there another way in Emergence Basic
You need to use \\ if you want a slash.
openfile(myfile,"c:\\basic-file\\" + fileband$ + ".txt", "W")
See the users guide.
http://www.ionicwind.com/guides/emergence/language_topics_constants_and_literals.htm
Section "String Literals"