# Changes between Initial Version and Version 3 of Ticket #2525

Ignore:
Timestamp:
11/25/15 13:22:14 (5 years ago)
Comment:

### Legend:

Unmodified
 initial The OptimizationSupportScript is missing a StorableClassAttribute and therefore cannot be persisted. Some types do not have a StorableClassAttribute although they have storable members or a storable constructor, e.g. SimpleSymbolicExpressionGrammar. If a type contains a storable member but has no StorableClassAttribute, it cannot be persisted, e.g. OptimizationSupportScript of an ExternalEvaluationProblem.