Search the threads for InRoads Survey discussions - there are a number of them about issues that InRoads users will encounter in processing a fieldbook in OpenRoads. One of the more critical is the setting that specifies the Alpha Code must appear before the linking codes (control codes) and it is also necessary to specify the characters to be used as linking codes - the defaults may not match InRoads.
For some reason, when using the linked XIN file, it does not use it to read the control codes to use.
The last thinh is a configuration variable that specifies that spaces are required between alpha codes and linking codes. Otherwise, if you have alpha codes that begin with the same characters as some of your linking codes, the software reads the initial characters as some type of linking code and then reads the remaining characters as some type of alpha code - which usually results in it treating them as unknown codes.