I have a data flow task where the data from oracle source is fetched and stored in SQL Server DB after nearly 400k rows the data flow fails with following error.
ORA-01489 result of string concatenation is too long


I the Execution results the [Oracle Source [1543]] Error: what this exactly means.
After a long battle i decided to modify the package and it turns that deleting and creating the all the tasks again has solved the problem.
Real cause is still unknown to me.