All UDTT components recognize the class com.ibm.btt.base.FormatElement, but not the class com.ibm.btt.format.FormatElement.
The com.ibm.btt.base.FormatElement is the class of the Formatter in versions of UNICOM® Multichannel Bank Transformation Toolkit prior to version 6.1, and the com.ibm.btt.format.FormatElement is the class of the Formatter in UNICOM® Digital Transformation Toolkit version 10.0 and UNICOM® Multichannel Bank Transformation Toolkit version 6.1 and later.