The 1.0 C binding spec requires that DRMAA_ERRNO_NO_MORE_ELEMENTS be returned by the string vector helper functions, but it doesn't include that value in section 5.1.5 (C Preprocessor Directives for DRMAA Error Codes), so the proper integer value is not listed. Should this be added to the end? #define DRMAA_ERRNO_NO_MORE_ELEMENTS 24 --Ed