In most cases, the error occurs during transformation due to unexpected input of data values. There can be several different scenarios when an error may occur. For example- while applying a transformation to column data, loading data into destinations, extracting data from sources, etc.
The most critical errors commonly found in SSIS are :
Data Connection Errors : This type of error is commonly seen when the connection manager cannot be initialized with a connection string. This can be seen in both the data-source and the data-destination, along with the control flow that uses the connection strings.
Data Transformation Errors : This type of error is observed while converting the data from the data source to a destination (in the data pipeline).
Expression Evaluation Errors : This type of error can usually be seen in a scenario where values evaluated at a run-time exhibit invalid performance.
