2108774 - Error: SQLCODE -1110 - SQLE_SYNC_NOT_REENTRANT - "UltraLite cannot synchronize because a synchronization is already running" when two threads synchronize an UltraLite database

• You have multiple threads executing in your UltraLite application
• Multiple threads request the ULConnection.Synchronize() or the ULConnection::Synchronize() method concurrently, in either a background thread or a foreground thread
• You receive the error: SQLE_SYNC_NOT_REENTRANT - "UltraLite cannot synchronize because a synchronization is already running" with a SQLCODE / errorCode -1110 value

• SAP SQL Anywhere 16
  SAP SQL Anywhere 12
  SQL Anywhere 11
  SQL Anywhere 10
  
  
• UltraLite database engine
  
  
• All Supported Platforms

sybase , KBA , BC-SYB-SQA , SQL Anywhere (on premise, on demand) , Problem