# eXtremeDB Data Definition Language Error Codes

> The following error codes indicate non-fatal error conditions that might be returned by the eXtremeDB runtime while processing Data Definition or Dictionary operations:

> Mnemonic Constant Name
> Value
> Meaning
> MCO_E_DDL_NO_MEM
> 800
> Dictionary can not fit in the reserved area
> MCO_E_DDL_UNDEFINED_STRUCT
> 801
> Struct referenced by field is not yet defined
> MCO_E_DDL_INVALID_TYPE
> 802
> Unsupported field type
> MCO_E_DDL_FIELD_NOT_FOUND
> 803
> Reference field is not found in the class
> MCO_E_DDL_INTERNAL_ERROR
> 804
> Internal error
> MCO_E_DDL_MCOCOMP_INCOMPATIBILITY
> 805
> Dictionary was generated without `-nosort` option
> MCO_E_DDL_TOO_MANY_CLASSES
> 806
> Limit for maximal number of classes in the dictionary is reached
> MCO_E_DDL_TOO_MANY_INDEXES
> 807
> Limit for maximal number of indexes in the dictionary is reached
> MCO_E_DDL_TOO_MANY_EVENTS
> 808
> Limit for maximal number of events in the dictionary is reached
> Invalid return codes
> 809-899
> Values between 809 and 899 are not valid eXtremeDB return codes

> Related Topics