Even though the major version (3) matches, the jump in the minor version (from 3.2/3.4 to 3.6) usually means changes in the driver interface. So 3.2.x or 3.4.x libraries aren’t guaranteed to work with a 3.6.x sys file. It’s best to keep both at the same major.minor version (e.g. 3.6.x with 3.6.x) to avoid compatibility issues.