Hard to tell, as I don't know what your data flow actually does.

But the error message says that you try to stuff a 50 character string in a 5 character field.

That does not work without any truncation.

My guess: You do a string datatype transformation (50 is the default length for a string with this component). If your source data is longer than 50 characters you have to set the truncation error handling in the data transformation to "ignore".

If I am wrong it would be very helpful to have more information about your data flow.