overlap in resource data gap in resource data operation cancelled duplicate IDs duplicate types reference list overlaps with name list reference list too small reference list too big gap after reference list overlap in reference list gap in reference list bad map offset bad data length bad data offset bad reference list offset too many references for this type too many types in type list bad name list offset bad type list offset bad file length out of memory bad map length no resource fork map not at end of data data not at end of header internal error (should never happen)