Assume that you use merge replication in Microsoft SQL Server 2008 R2, SQL Server 2012, or SQL Server 2014. When you use a custom stored procedure resolver to resolve conflicts, additional characters are added to the character type data after conflict resolution. Additionally, the merge agent may fail, and the following error may be logged in the replmerg.log file:
ERROR: ErrNo = 0x8004565a, ErrSrc = <null>, ErrType = 8, ErrStr = The Merge Agent failed because the schema of the article at the Publisher does not match the schema of the article at the Subscriber. This can occur when there are pending DDL changes waiting to be applied at the Subscriber. Restart the Merge Agent to apply the DDL changes and synchronize the subscription.
The issue occurs because of the way that the conversion of some data types occurs during conflict resolution.
To work around this issue, use the default resolver, or use any other COM resolvers provided. If there are no provided resolvers that address your needs, you may develop a custom COM resolver instead.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.