When creating links between pipeline variables and transformers, dimensional differences between the source and target variables may cause an exception. If the target variable dimensionality is greater than the source variable dimensionality, an exception will not be thrown. However, if the source variable dimensionality is greater than the target variable dimensionality, Integration Server throws an exception.

Dimensionality refers to the number of arrays to which a variable belongs. For example, the dimensionality of a single String is 0, that of a single String List or Document List is 1, and that of a single String Table is 2. A String that is a child of a Document List has a dimensionality of 1. A String List that is a child of a Document List has a dimensionality of 2.