All Oracle Error CodesOracle DBA Forum

O2U-00208:

One or more characters in an attribute name were not legal identifier characters
Cause: If an attribute name contains one or more characters that can not be translated to a legal C or C++ identifier character, the characters that can not be translated are replaced with underscores. To find the affected attribute or attributes, look in the declaration generated for this type for data member names that have extra underscores not present in the original attribute names.
Action: Specify explicit translations for the affected attribute names in the INTYPE file, or just use the translated attribute names with added underscores.