# Type 2: Error message by data transfer from parameter list to control device

An error message is generated if a parameter file cannot be completely transferred to the controller when the controller is started or when the parameters are updated.

These error messages contain the following additional diagnostic data:

Data format | Element | Contains
UNS16 | listen_typ | List type
STRUKT_NAME | strukt_name | Structure element

Practical examples:

- Violation of technological or logical limits in the MDS
- Incorrect assignment of MDS_entries